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When you become so confused and flabbergasted that you just sit down on the spot and masturbate.
Girl: That was some great anal!
Boy: Thanks!
Girl: BTW, I'm a guy.
Boy *sits down and flabberbates*
by Bassman150 September 15, 2011
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When a man with a big big belly grabs, shakes a giggles his belly while at the same time fakely moans in pleasure. A false substitute for masturbate.
Mark wanted to show his pleasure from the situation, that he lifted up his shirt, grabbed his belly and began to flabberbate.
by Chunkyc September 15, 2006
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