Perc

[Britney]

short for percolator (I could be spelling that wrong). A perc is an additional chamber in a bong, and its purpose is to make the hit more smooth. Bongs can have multiple percs.

[Britney]

Slang for the perscription drugs [Percocet] or [Percodan], which is an opiate or [painkiller], commonly used recreationally for its euphoric effect.
Ironically, Percocet is an [opiate], which is a nervous system depressant, and the slang term perc cannot be verbally distinguished from [perk], which means to make more alert or active.

[Couch Potatoe]

Vocal percussion (beatboxing) in an a cappella group