Wank slap 

A funny prank to play whilst drunk at a party or sleep over. Much like placing cream in the open hand of a passed out or sleeping person and tickling them on the face so they slap cream in their face. This is very similar, only using a different kind of "cream". One masturbates on to a piece of tissue, and places the used tissue dry-side-down on to the victims hand. The victim is then tickled on the face to entice them to scratch to itch, and then end up with a wanky tissue stuck on their face.

Dave: Mate, Simon's out cold.
Frankie: Shit, yeah. Hey, he's got one hand open.
Dave: You thinking what i'm thinking?
Frankie: Hell yeah! Let's wank slap this dude.

Wank slap by jewittinspace August 13, 2010

Wank Slap 

Where you slap yourself during masterbation either by accident or on purpose.

I gave myself a right badass wank slap yesterday.

Wank Slap by Piss Cheeser August 24, 2009

wank slap 

To Slap someone repeatedly on the forehead/face with your penis while they have passed out at a party.

Oh man, that party last night darren was the first one to fall asleep so i gave him a wank slap.

wank slap by Andy Scotland December 7, 2007