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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!!!"
by RoflDave April 19, 2009
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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.
by D$A$V$E May 19, 2006
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