A term used when fustrated at a situation or person.
(You are at work and you are already in a bad mood when your boss hands you more work to be done ASAP)
by LuxyLyx November 08, 2004
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