Gerb

(n) A slang term for the common smoking apparatus: the gravity bong. A regional term coined in Northern Virginia, and is used to describe a tightly packed gravity bong; AKA geeb.

(v) Another word for the action of smoking marijuana; AKA chief, spark, or smoke.

Damn, that is a fat gerb right there, bro.

Yo, you trying to gerb later?