look up any word, like blumpkin:
a wet fart gone bad or another name for a Rhino
I thought I had to fart but I actually have a poo bubble in my slacks
by Pootsa August 17, 2007
It is referred as a smelly sustances that comes from the rear. (Fart)

Usually known for a girl named Stacey to do it.
Stacey: I need to poobubble
Kid 01: Go on, do it, it'll feel goooood
by poobubble January 25, 2008