1 definition by shythewise
The little pieces of crap you discover between your butt cheeks when you go to have a shower or bath.
"Damn, grumblebunnies again! I thought I wiped myself good!" , "Um, no thanks, there are grumblebunnies present!", "Shut up, or I'll smack the grumblebunnies out of yo' nasty mouth!", "Grumblebunnies, ewww!""
by shythewise April 22, 2010