look up any word, like sex:
 
1.
to have an orgasm 'up the arse'.
my dad gives better bumgasms than your dad does
by chad March 13, 2005
20 12
 
2.
The feeling of immense well being that arises from taking a big satisfying shit.
I was dying for a turd and had to use the management toilets, it was a whopper, I totally bumgasmed! My turds are always big when I eat muesli.
by boshface May 23, 2011
1 3