1 definition by jettt
A modified down tube for a water pipe that instead of just having one large hole opening into the water, instead the glass comes to a closed tip, along which are several smaller holes. This supposedly cools the smoke before being inhaled by diffusing (spreading) the smoke over a larger area.
Fuck, smashed my down tube cleaning it. Replaced it with a diffuser instead so my smoke should be cooler.
by jettt December 2, 2006