1 definition by lost in Iowa

Top Definition
Pronunciation: Grum-pee. The act of breaking wind; flatulence. A slang term for having particularly foul smelling gas; a nasty stinky fart.
1) Dude, who busted that nasty grumpy.
2) He floated a grumpy in class. Stunk so bad even the teacher left.
3) I suppose if I have to I can live with Bill's farts, but when he floats a grumpy it makes my eyes water and I have to draw the line
by lost in Iowa April 02, 2009

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