Top Definition
A vaginal fart, typically occuring during intercourse.
I was chewing her box when she let out a flumpus that parted my hair.
by joebob296 January 06, 2006
an unerect penis, or any other type of floppy material
ohhhhhhh flumpus.

one time he slapped her with his flumpus and she cried.
by p-mo May 14, 2006
An idiot, lil bro that u want to beat the living shat out of all the time.
the flumpus pissed me off so much that i tied him to a chair and pissed on his face.
by ant April 02, 2004
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