to smack incessantly with a fish; the highest form of physical insultation
Mrs. Creasy and Mrs. Pruden are two individuals who most certainly should be fwapped.
by JessIsTheBest December 15, 2004
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1. Jerking off or calling someone else a jerk-off.

2. A motion made with the fist and forearm in a jerking manner.
"Hey Bill, Jason told me he's been fuckin your girl since you two broke up!"

"Fwap fwap fwap"
by Max Powers Esq. AC PHD November 13, 2009
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To hit someone upside the head with your hand unless otherwise specified.

Netspeak

see thwap
Jeez, that guy was such a moron. *fwaps him*

Erg! She makes me so mad!! *fwaps her w/ a brick*
by Nonya Beezwax June 28, 2004
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The sound of your balls and taint slapping your inner thigh as you masterbate
The neigbors heard little Timmy fwapping through the thin walls of the brothel.
by McGreg August 12, 2007
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See fwap.

Also see fapping; which is not quite the same thing.
I'm going home for a spot of fwapping.

Those aliens have been fwapping half the buildings in Washington and it's got to stop!

I spent many a happy hour fwapping Matilda between her thighs.
by Church Wolf August 16, 2006
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fwap: the idea of being intentional friends before pursuing a dating relationship. being more than friends, less than lovers.

F.W.A.P: Friends With A Purpose
Johnnny and Sue fwap-ed for 6 months before they began dating.
by aquanaut11 March 4, 2011
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