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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Let’s play fwap chopsticks

I’m gonna fwap

Why is my fwap over there
by IAC DBA December 11, 2019
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Bryan came by last night and I let him fuck me in the ass until I fwapped.
by Hobby-less March 14, 2017
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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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Fwap is the noise associated with balls slappin against a chick when fucking her doggie style.
After I satisfied Sally Jane with a hearty session of rearward penetration, I realized I had left a noticable redmark in her fwapping area.
by El Chodo Con Queso September 26, 2003
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