Weasel slap 

When one surreptitiously slaps his unsuspecting friend in the face with his male member

Greg, with stealthful precision, approached Lee from behind, and weasel slapped him in the face as he watched "The Highlander" in a drunken stupor.

Weasel slap by G Fuckin Money August 19, 2013

Weasel Slapper 

A male that chronically masturbates to internet porn. Typically unemployed, lives with parents and can't otherwise function without his dick in his hand.

Carl's a weasel slapper. He doesn't work, lives at home with mommy and faps all day to like 10 different porn site accounts.

Weasel Slapper by Eaton Holgoode April 26, 2017

slapping the weasel 

Having sexual intercourse.

Ricky: Where's Paul?
Russell: He's round Adelenes slapping the weasel.

slapping the weasel by lde_ricky December 14, 2008

Slapping the Weasel with the Right One 

The act of masturbating, typically with the use of one's right hand.

Simon: "Dude, Ofena's claiming that Malcolm took advantage of her!"

Fredrik: "What!?, but she was the one who was trotting her turkey all up on his jive! Damn! If he would have just gone home and been slapping the weasel with the right one this never would have happened."

Slapping the Weasel with the Right One by J. H. Grissom September 27, 2008