gbt is an acronym for Gravity Bong Toke. it is the preferred method of ingestion among many potheads
. typically, the user will position a bowl on the mouthpiece of an empty 2-liter bottle of pepsi with the bottom cut off. whilst burning the tweeds
in the bowl the user slowly lifts the 2-liter from a container of water which creates a pressure and simulates the sucking of the bowl. the empty 2-liter quickly becomes quite full with milky smoke. the user then takes one long exhale, lifts the bowl from the mouth of the 2-liter and proceeds to incapicitate his or herself for the next 3 hours by enhaling the toxic smoke.