Definitions by The Krunk Wizard Giz

slab

Crack, Cocaine.

Usually used in turn with terms hitting, slamming.

I've been hitting the slab pretty hard, man.
I've been slamming the slab for weeks now.

A drug fiend. Someone who abuses or steals drugs

Harry has gone from just experimenting with pot to being a total goblin about the whole thing, man.