poo bubble 

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

poo bubble by Pootsa August 21, 2007

poobubble 

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

poobubble by poobubble January 25, 2008