2 definitions by Joe Jenco a.k.a Sir Flap Jack

To stick your bare ass out the window of a friends car while passing another driver because he/she is driving like a douchebag infront of or beside you. can be done on either side of car but works best when you are turning left and they are stopped at a red light.flapjacking flap jack
why did you flapjack him?
Because he was doin 35 n a 50 zone
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one who flapjacks, relating to mooning flapjacking flapjack
he is such a flap jack, always flapjacking people.
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