"30 Something" is the third single from Jay-Z

Jay-Z

Shawn Corey Carter , better known by his stage name Jay-Z, is an American rapper, record producer, entrepreneur, and occasional actor. He is one of the most financially successful hip hop artists and entrepreneurs in America, having a net worth of over $450 million as of 2010...

's album Kingdom Come

Kingdom Come (Jay-Z album)

Kingdom Come is the ninth studio album by American rap artist Jay-Z. It was released on November 21, 2006. It was considered a "comeback album" for the established rapper, as 2003's The Black Album was slated to be his final release...

and was produced by Dr. Dre

Dr. Dre

Andre Romelle Young , primarily known by his stage name Dr. Dre, is an American record producer, rapper, record executive, entrepreneur, and occasional actor. He is the founder and current CEO of Aftermath Entertainment and a former co-owner and artist of Death Row Records...

. The main theme of the song is Jay undermining "flossin" as pertaining to the general view on hip hop

Hip hop

Hip hop is a form of musical expression and artistic culture that originated in African-American and Latino communities during the 1970s in New York City, specifically the Bronx. DJ Afrika Bambaataa outlined the four pillars of hip hop culture: MCing, DJing, breaking and graffiti writing...

. He references that he's done everything that the "young cats" are doing now and prefers to conduct himself in a more grown-up manner.

An official remix was made, which was called the "Greg Street Remix". It features rappers Ice Cube

Ice Cube

O'Shea Jackson , better known by his stage name Ice Cube, is an American rapper and actor. He began his career as a member of the hip-hop group C.I.A. and later joined the rap group N.W.A. After leaving N.W.A in December 1989, he built a successful solo career in music, and also as a writer,...

 and Andre 3000

André 3000

André Lauren Benjamin , better known by his stage name André 3000 is an American rapper, singer-songwriter, multi-instrumentalist, record producer and actor, best known for being part of American hip-hop duo OutKast alongside fellow rapper Big Boi...

 of OutKast

OutKast

Outkast is an American hip hop duo based in East Point, Georgia, consisting of Atlanta native André "André 3000" Benjamin and Savannah, Georgia-born Antwan "Big Boi" Patton. They were originally known as Two Shades Deep but later changed the group's name to OutKast...

.