When someone poops and pees into a jar/cup with a sealed container,lets it sit fir 3 days, then inhales it through their mouth to get high.
He is about to go do jankums.
by Csettles February 20, 2009
jankum is when you take a somewhat large crap and put it in a bottle with a balloon on top and after a few days of extreme heat sniff in the gas' that have accumulated in the balloon go into a state of being high
Jim "yo dude i just took in three balloon-fulls of jankum and im so high right know." Kyle "get out of my face thats disgusting bro"
by dangle my eggo January 30, 2009
word invented by abshnasko, a synonym for "stuff"
lemme hollar at that jankums yo
by abshnasko April 01, 2005