To slap someone with a handful of spunk.
You see your honor, I was asleep in my own home when this dude spunk slapped me, that's why I fuckin' shot him.
the action of cumming in ones hand and slapping someone in the face with said hand.. said to be a great insult.
"Martin drops my beloved coffecup and breaks it thus breaking my heart.
There was notheng left to do than to spunk slap him."