To fart in your hand and place it in an unsuspecting persons face.
1: Dude, that Crusty Fluff was rank!

2: Yea, thats payback for the Crusty, Asshole!!!
by Bang'n March 23, 2008
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crusty banana fluff is when you grind up cornflakes into little pieces and sprinkle it up your bum.
Jesus: please can someone lick up my crusty banana fluff?

Graham Norton: i can take care of that.
by Mr. Wibble May 1, 2008
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