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The act of ejaculating on ones hand and then slapping another person in the face.
Today I gave Melinda a Slapjack after that bitch ate the last hot pocket.
by BWeezyAflo December 17, 2010
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
The action of a naked man shimmying side to side, like a washing machine agitator, causing his dick to thwack against his thighs.
She woke to the dulcet sounds of her husband doing slapjacks by the bed.
by marydelta August 16, 2011
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3
A hand held batting weapon used in hand to hand combat. Consists of a heavy metal weight and a flat profile handle wrapped in leather. Can be swung in the same manner as a baseball bat.
1.Ricko went and clapped T.J in the dome with a slapjack and split that fools wig.
2. That jabroni Marcus tried me on some shit last night so I hauled off and blasted him in the nads with a slapjack.
by Box of Wood Spiderz November 25, 2020
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4
When you masturbate while your girlfriend is asleep and right before your gettting ready to cum slap your girlfriend in the face to wake her up then cum on her face.
My girlfriend was asleep on the couch when I got home from work so I gave her a slapjack.
by DErekd June 13, 2018
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5
Mixed alcoholic beverage originating in Bellingham, WA. Created by mixing one gallon jug of Carlo Rossi Pisano wine, one bottle MD 20/20 Orange Jubilee bum wine, one bottle Andre Extra Dry Champagne, and one can orange concentrate. Serve luke warm.
Damn Joe, you're fucked up! What did you have to drink? - Jesse
Oh, you know. Just a jug of Slapjack! - Joe
by Sugar Shack Boys March 19, 2010
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6
A game in which two people slap the shit out of each other until someone either gives up or dies.
Bro did you hear what happened to Jamal? Apparently his ass lost in a game of slapjack.
by Reckewww01 January 24, 2019
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