Junkslap 

When a naked guy swings his junk up and down so the balls slap the gooch.

While I was waiting for the shower to warm up I did the junkslap.

Junkslap by D. Y. Vetz June 21, 2019

Junk-Slap 

Occurs when a man accidently hits himself in the junk as a result of a limb that has gone awry, or from an out-of-control object.

Usually acompanied by witnesses singing to the tune "Love Shack," except replacing the lyrics with "Junk Slap."

He junk-slapped himself while drumming.

"Sweet beaver! I junk-slapped myself!!!"

Junk-Slap by RoflDave April 20, 2009

Junk Slap 

Male sex organ known as penis is used as a tool for slapping any given person across (his/her) face. refer;<pimp slap, bitch slap>

I junk slapped <person's name> across (his/her) face.
I junk slapped Jessica across her face.

Junk Slap by D$A$V$E May 25, 2006