"Knuck If You Buck" is a song by American Southern hip hop group Crime Mob. It was recorded at PatchWerk Recording Studios in Atlanta and released on June 29, 2004 via Reprise Records as the first single from their self-titled debut studio album Crime Mob. Written by members Jarques "M.I.G." Usher, Chris "Killa C" Henderson, Jonathan "Lil' Jay" Lewis, Venetia "Princess" Lewis and Brittany "Diamond" Carpentero, it was produced by Lil' Jay, and features fellow rapper Lil Scrappy. Wikipedia