Biscuit

Gun; another way of saying side piece. Side piece can also mean a secondary lover so you may see biscuit used in that sense as well. Comes from the fact that biscuits are side pieces to a meal.

Inspectah Deck on “Bring Da Ruckus”: “I rip it, hardcore like porno-flick bitches, I roll with groups of ghetto bastards with biscuits.”