Grinds are a form of skateboarding trick where the skateboarder slides on the side or on the trucks. Grinds

Grind (sport)

Grinding is a sliding stunt performed in many extreme sports. Stances in which slides are performed are known as grinds.Grinding is performed by sliding across the top of an obstacle, and can be accomplished in a number of ways...

 are performed on any object that may fit between the space between the wheels where the truck meets. There's about 30-45 skate truck companies as of 2011.

The move likely originated in backyard pools in the 70's, as the early skaters gained in skill and confidence with their high speed carves around the top of the pool walls and one day went that little bit too high. The trucks of the time, often being merely 'borrowed' rollerskate trucks, didn't allow much contact due to their inherent narrowness, but as skateboarding gained its own truck manufacturers who widened the hanger design, the possibilities for exploration became apparent, and all sorts of moves started popping up. There was a big leap in street skating starting in the 90's. It has evolved ever since. Today, they're commonly performed on handrails, lips of benches, tables, hubbas (ledge on a slope) or a hard normal ledge.

Grinding is damaging to materials which are not hardened for the specific purpose of the sport, as may be found in a skate park. The trucks are a composed of a hard metal without lubricant or bearings on the grinding surface, so they literally do grind on the objects they slide across. Wax is essential to this. Grinding can strip paint off of steel and wear down the edges of concrete, stone, aluminum, and wood building materials. Grinding in public places may be seen as a form of vandalism

Vandalism

Vandalism is the behaviour attributed originally to the Vandals, by the Romans, in respect of culture: ruthless destruction or spoiling of anything beautiful or venerable...

 and might cause skateboarding to be banned by business owners and city ordinances.

BS or FS

Whether a grind trick is BS (back side) or FS (front side) depends on how you approach the rail or edge. If the skater approaches the rail with his back to it the grind is a backside grind and if the skater approaches the rail with the front of his body to the rail then the grind is a frontside grind.
This can be confusing with grinds such as a boardslide, as with a BS boardslide you are, in fact, moving forwards. This is because you must approach the rail with your back to it in order to ollie 90 degrees and land facing forwards on the rail.

However, many people believe that the denoting factor in whether or not a grind is FS or BS is the direction in which the skater rotates as they approach the rail. if the leading foot travels with the toe pointing in the direction of the rotation, this is a BS grind, as the bodys movement is similar to that of a BS ollie, similarly, if the heel of the leading foot is pointing in the direction of travel then the grind will be considered FS.

Modern Grinds

50-50 Grind

The 50-50 grind is where both trucks are on the edge. This move evolved from the horizontal-stance carve grind in pools and was taken up on top of the lip by such skaters as Jay Adams

Jay Adams

Jay Adams is one of the original Z-Boys and is considered one of the most influential skateboarders of all time.-Career:He was born in Venice, California...

, Tony Alva

Tony Alva

Tony Alva , is one of the original Z-Boys and is considered to be one of the most influential skateboarders of all time. He was professional skateboarding's first world champion in history, a title he won in 1977.-Career:...

 and Stacy Peralta

Stacy Peralta

Stacy Peralta is an American director and entrepreneur. Peralta was previously a professional skateboarder and surfer with the professional skateboarding group, the Z-Boys.-Early life:...

. Also called "Axelgrind".

http://theberrics.com/trickipedia/kickflip-backside-5050.html?autoplay Combo: Manny Santiago kickflip to bs 50-50.
5-0 Grind

Pronounced "Five-Oh". In this maneuver, the back truck grinds the rail/edge, while the front truck is suspended directly above the rail/edge. This move is similar to the manual, although the tail may be scraped against the obstacle as well as the back truck, which is not considered proper on a manual. Also called "Tailgrind".

Nosegrind

In a Nosegrind, the skateboard's front truck grinds a rail or edge, while the back truck is suspended over the rail/edge. It is similar to the nose manual, except performed on a rail, coping, or ledge. Rodney Mullen

Rodney Mullen

John Rodney Mullen is a professional freestyle and street skateboarder. He is widely acknowledged as one of the most innovative and influential street skaters in the history of skateboarding...

 is one of the few people who can balance a legitimate nosegrind down a lengthy handrail. This move originated on vert, initially in the form of Neil Blender's New Deal (nose pivot to disaster), then by his more advanced progression of said move, the "Newer Deal", which left out the disaster part and just pivoted all the way back in.

Crooked Grind

Also known as Crooks, Pointer Grind, or the K-grind after the man to whom the trick is most commonly accredited, Eric Koston

Eric Koston

Eric Koston is a Thai American professional skater who grew up in San Bernardino, California.He began skating in 1986 and remains active. He was first sponsored in 1991 and turned pro in 1993. He has been featured in the "Tony Hawk" video game series and "EA" Skate 2 and Skate 3...

. It is like a nosegrind, but the tail of the board is angled away from the rail/ledge on which the trick is performed, causing the edge of the deck's nose to also rub. Invented by Dan Peterka.

Overcrook Grind

The same as a Crooked grind but the skateboarder ollies over the rail at an angle. It is when the majority if the board is angled on the opposite side of the rail to a normal 'crook' grind.

Feeble Grind

In this move, the back truck grinds a rail while the front truck hangs over the rail's far side. Professional skateboard legend Josh Nelson is the inventor of this grind back in 1986 at the Del Mar skate ranch in Del Mar, California. The name feeble grind came from Josh Nelson's friend and fellow skateboarder Sean Donnelley. Sean used to call Josh "the feeb" which was short for feeble, because Nelson was so skinny and often had broken limbs and injuries from skateboarding. Many people watched Josh create this unique type of grind and people would say "Look at the "Feeb" do the feeble grind!"

Smith Grind

This maneuver entails the back truck grinding an edge or rail, while the front truck hangs over the near side of the object,leaving the edge of the deck to rub the lip/edge. This trick was named after its inventor Mike Smith (skateboarder). It is considered by many to be the most difficult basic grind trick.The backside version was originated by deaf Florida powerhouse Monty Nolder.

Willy Grind

Very rarely executed, the Willy is done with the front truck sliding on the grinding surface (as in a nose grind) while the back truck hangs down below the surface on the side to which the skateboarder approached. Also called "Nosesmith" or "Scum Grind."

Losi Grind

Popularized by Allen Losi. A Losi Grind is the equivalent of a feeble grind on the front truck. Also called "Nosefeeble," "Over-Willy" or "Over-Scum."

Salad Grind

This is very similar to the 5-0, but the front truck is suspended over the far side of the rail/edge the grind is performed on. Like the "overcrook" grind is like a crooked nosegrind the Salad grind is like a crooked 5-0, or a combo 5-0/bluntslide. This trick has been invented by Eric Dressen, hence the name (dressen, dressing, salad dressing).

Suski Grind

This is also very similar to the 5-0 but unlike the salad grind your front trucks are pointed towards you like a smith grind but above the ledge unlike the smith grind

Hurricane Grind

A 180 degree turn into a backwards feeble grind, exiting via a little less than 180 degree return spin. This trick was invented on vert by Neil Blender in 1985; an early proto-version can by witnessed in Powell Peralta

Powell Peralta

Powell Peralta is an American skateboard company founded by George Powell and Stacy Peralta in 1978. The company rose to prominence in the 1980s as skateboarding began maturing as a sport. The company featured the Bones Brigade, a team of the era's top competitors...

's second video, Future Primitive

Future Primitive

Future Primitive may refer to:* Future Primitive , from Southern California* Future Primitive and Other Essays, a collection of essays by anarchist John Zerzan...

, during Blender's brief cameo appearance on Lance Mountain

Lance Mountain

Robert Lance Mountain was one of the more popular skateboarders throughout much of the 1980s, and one of the five most legendary members of the Bones Brigade, as featured in the 1987 classic The Search For Animal Chin .Mountain was born in Pasadena, California...

's backyard ramp. Many of today's pros also do it on street obstacles such as handrails and ledges. This trick is easier to perform backside, but Tony Hawk

Tony Hawk

Anthony Frank "Tony" Hawk , nicknamed "The Birdman" is an American retired professional skateboarder and actor. Hawk gained significant fame for completing the first 900 as well as his licensed video game titles distributed by Activision...

 did introduce the rarer frontside version in 1989.

Bluntslide

Basically a tailslide but facing upwards on the obstacle. It's just impossible for it to face straight up. Simple, but it's actually one of the most difficult grinds in skateboarding history. The skater faces the obstacle parallel to it, then does a 90 degree turn, and then puts the board facing up to the sky. :D IMPORTANT: When a person does a bluntslide, it's almost impossible for the whole board to face up, that's simple impossible physics. It's just impossible for it to face straight up. Like the Impossible trick.

Nose Bluntslide

The same as a bluntslide but on the nose of the board. Just like a bluntslide, it's also very difficult.

Caveman Grinds

A caveman grind is when a skater, instead of ollieing up onto a rail, starts with the board in his hand, places it onto the rail in the desired grind position and at the same time jumps onto the board, starting the grind.

Barley Grind

This is where the skater does a full 180 and land switch on the obstacle in a smith grind. the combination of the 180 and the switch smith make the trick a barley.

5-0 Hand Drag

This trick is a 5-0 and while doing one, you drag your back hand on the rail/ledge.

Tractor Grind

5-0 Hand Drag with the front hand

Dark Temper

A Darkslide except you have one foot in the middle of the board.

Nosegrind Hand Drag

This trick is a nosegrind while you drag your back hand on the rail/ledge.

Sugarcane Grind

This is essentially an over rotated lipslide

Lipslide

Lipslide is the debut solo album from Saint Etienne lead singer Sarah Cracknell. The album was co-produced by Cracknell and a variety of producers and released in the UK by Gut Records in 1997. Upon its release Lipslide earned favorable reviews from music critics, although it was not a commercial...

 that lands you in position similar to a hurricane. A frontside sugarcane would have you in the same position on a rail as a backside hurricane and a backside sugarcane would be like a frontside hurricane. Another way to think about a backside sugarcane, is like a backside 180 into a switch smith grind.

Chocolate jammy

a Feeble over turn, or a feeble to losi grind.

Freestyle

Layback Grind

This is an archaic variation of the basic frontside or backside grind whereupon the skater leans back ("lays back") and places their trailing hand on or near the lip being ground,ostensibly to help "push" the grind further. Original Bones Brigade member Jay Smith

Jay Smith

Jay Alexander Smith is an English footballer who plays for Conference National side AFC Telford, where he plays as a midfielder.-Playing career:Smith started his professional football career with Aston Villa...

 did the earliest and most popular frontside examples, slashing out violently at the lip with his board while placing his hand well down the transition, in a very "surf-style" pose. By 1979 the move was being taken up on top of the lip (both truck and hand) by Duane Peters

Duane Peters

Duane Peters , nicknamed "The Master of Disaster", is a punk rock singer/songwriter and professional skateboarder. Active since 1977, he is probably best known as the singer in the California punk rock band U.S...

, the distinction being noted by the adjustment of the name to "layback roll-out",or occasionally,"layback grind-to-tail". The backside version was introduced by Eddie "El Gato" Elguera later that same year.

Wax the Rail

When you do a Nosegrind Hand Drag with the front hand.

Boardslide Hand Drag

Same as a 5-0 Hand Drag except you do a boardslide and drag the hand of your choice.

Boardslide Body Varial

This trick is performed by doing a frontside boardslide, While doing it the skater jumps and turns his body 180 degrees and lands back on the board. Originally called a "Slide n Hope" as in "Hope you/I make it" Invented by Jim Thiebaud of Real Skateboards.

50-50 Body Varial

In this trick the skater does a 50-50. While doing so he jumps and turns his body 180 and lands back on the board.

Casper slides

Grinds when the board is upside down and your back foot is on the tail while your front foot lifts it up from under. Can be performed like a dark tailslide/bluntslide or a dark 5-0. Usually dark tailslides are usually called casperslide/grind the others are referred to as casper and the name of the trick not dark because of the foot being under. all back truck grinds/slides can be combined into casper variations.

Anti-Casper slides

grinds like casper slides/grinds except your front foot is on the nose and back foot if lifting the board up. most common ones are dark nosegrinds and dark noseslides/nosebluntslides. Usually dark noseslides are referred to as anti-casperslide/grind while the rest are referred to as anti-casper and the name of the trick (accept if it is resembles a nosegrind it is called 5-0 due to it not being a grind)due to the foot being under. All front truck grinds/slides can be combined into anti casper variations.

Dark 50-50

likes a darkslide but the board is upside and the whole griptape slidso n the rail/ledge. Basically it is a 50-50 with the board upside down. Can be called at "Tapeslide" or "Darkgrind".

Primo Slides/Grinds

When in rail stance and slide on the ledge slash rail. Primo grind in when you grind on both wheels/bearings in rail stance.

Pogoslide

When you are in pogo stance and are grinding on bottom trucks.

Grab Grinds

When you do grabs on the board while grinding. All nosegrinds/slides are used a lot with a tailgrab. All tailgrind/slides are usually used with a nosegrab. A lot of combos can be made using grabs on boards.

One Footed Grinds

Where you grind on one foot than land. One footed crooked grinds are most common because lots of time your back foot comes off because most pressure is on the front foot. Every grind can be one footed.

Crailslide

Very common grab grind where you do a tailslide and your back hand does a nose grab.

Hand Drag grinds/slides

When your hand slides on the rail while grinding usually don't on slides or grinds where you lean on a truck. Can be done in any grind.

Body varial grinds

When you turn your body 180 while the board slides. Almost always done on grind that doesn't require pressure with feet.

5-0 overturn

When the rider does a 5-0 and turn the truck into a nosegrind.

Nosegrind Overturn

When the rider is grinding on the front truck and turns it into a 5-0.

Crail Bluntslide

When the rider does a crail slide over the far side of the rail/ledge.

Seatbelt slide

When you do a nose slide and crab the tail with your front hand.

Seatbelt Bluntslide

You do a Nose Crailslide on the far side of the rail/ledge.

Darklipslide

When the rider does a darkslide but brings the back trucks over the rail.

Barley Feeble

270 to a switch feeble. Combination of both make it a barley feeble.

Crail grind

5-0 Back hand nosegrab

Seatbelt grind

Nosegrind front hand tailgrab.

Coffin 50-50

while lying on the board on your back you're doing a 50-50 grind.

Tailbock grind

Tailsldie nosegrab

Noseblock grind

Nosegrind tialgrab

Hangten nosegrind

Nosegrind when both of your feet are on the nose with your toes pointing forward.

Hangfive nosegrind

A one footed nose grind with your toe pointing forward.

Handstand Grinds

Require a long rail. Jump into a grind, then do a handstand on the board while grinding.