What is Glass On Glass?
1.
A type of connection on a water pipe, or bong, that does not use anything to make a seal around it (ie rubber gromets, o-rings, tape, glue) but instead its a taperd hole, with a tapered stem. the connection occures in two spots, on the stem connnecting it to the pipe, and one from the stem to the bowl.
"O sweet that Bong has glass on glass!"
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When you are doing a girl 'doggie style' and you are about to reach your climax, you proceed to dump a cup of coffee on her ba..
