Top Definition
It's when you invent a sign so girls won't notice that you check out their tits. And then get discovered doing your invented sign.
Grumb...
by KHDT October 08, 2010
2 more definitions
A mixture between dumb and gross.
"You are grumb!" exclaimed the naked boy.
by klam January 31, 2006
When you can't play basketball because you're sitting on the couch naked eating grapes and hoping to score with the lesbians that moved in under you.
I asked Justin if he wanted to play a game of basketball but he said he was too grumbed out. That's whack.
by JAGDrummer March 05, 2012

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