A female performing oral sex on another female while that female is defecating. Basically it's a lesbian blumpkin.
A girl might say "Hey, Ashley! I feel a huge deuce coming on. Do u wanna do the brumpski with me?"
by MamaSolo August 18, 2014
A saying, in which if you see something badass, you say it very loud.
Look at dem boobies! B-B-B-B-RUMP-SKI!
by Mustardman321 May 09, 2007