look up any word, like half chub:
 
1.
The wet, vibratory sensation when you put your mouth on someone's body (usually on his or her belly) and just blow. See also raspberry.
Grandpa loves to give his grandkids belly bluppies. I personally would rather be tickled than get a wet Zadie-style bluppy.
by LJMKP February 28, 2007
 
2.
To accidentally soil your pants whilst flatulating.
Oh CRAP!!! I have to go to the bathroom I think I did a bluppy!
by N. Matche December 14, 2004