Snap

A drug addict that you use for errands, they will do whatever you want in exchange for their drug of choice. They'll do just about anything you want, and quick. Name comes from 'snappin' your fingers and getting what you want BC people want what your sellin.
Snaps are most commonly crack heads and junkies.

Pittsburgh started this term

I got my snaps at Walmart right now, they're stealing me some shit for a few bags.

I called and told my snap to get over here and clean up the garbage my dog got into last night.