Slang for the drug "Jenkem"
Jenkem is the fermentation of raw sewage, the user will then capture and inhale the gas created during the fermentation process.
(Dude 1)~ Dude lets do some Butthash!
(Dude 2)~ Whats Butthash?
(Dude 1)~ We take all our crap and piss and put it in a jar cover it with a balloon, once the balloon is full we suck the air out and get high as shit.
(Dude 2)~ Sweet