A Basket Toss is a stunt performed in cheerleading

Cheerleading

Cheerleading is a physical activity, sometimes a competitive sport, based on organized routines, usually ranging from one to three minutes, which contain the components of tumbling, dance, jumps, cheers, and stunting to direct spectators of events to cheer on sports teams at games or to participate...

 using 3 or more bases to toss a flyer into the air. Two of the bases interlock their hands. While in the air, the flyer does some type of jump, ranging from toe-touches to herkies before returning to the cradle.

Bases

The person or persons who stays in contact with the floor while lifting a flyer into a stunt.

Flyer

The person that is held or tossed into the air by the bases in a stunt.

Toe-Touch

A jump where the legs are straddled, and extended, toes pointed, and arms in the T-motion. Documented as the most common cheerleader jump.

Herkies

It is named for Lawrence Herkimer, the founder of the National Cheerleaders Association. A jump where one leg is out to the side in a toe touch position and the other leg is bent toward the ground. Herkies vary from a left to a right herkie. In a left herkie, the left leg is straight with the right leg bent toward the ground, and viceversa for a right herkie.