Knucle slap 

verd,noun
n, a type of hit in which you are hit in the face with the knucles of someones hand this hurts more then an average slap and somettimes more than a punch. v, the action of this

dude1: dude whats wrong with your jaw it looks like you were hit in the face with a lead pipe

dude2: that fucking cunt steve knucle slaped me

Knucle slap by Wise old Buck March 29, 2009

Knuckle Slapped 

v. The act of a female punching a person (male or female) in the face. punch

"Julia knuckle slapped that bitch kissing her boyfriend."

Knuckle Slapped by Ibt January 23, 2016