7
After you are done jacking off, nutt into your hand and then run out of the room and slap your roommate right across the face with your cum filled hand.
Once I was done jacking off, I nutted in my hand and then I ran out and slap jacked my roommate right in the face!
by Ichi Crowtch January 14, 2008
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8
A game in which somebody yells "SLAPJACK!" and brutally slaps someone until their organs shut down.
Drew got his ass slapjacked so hard he fucking died.
by Reckewww01 January 26, 2019
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9
The act of slapping your dicks together until one person gets a boner. The person who gets the boner wins the bet.
Want to play slap jacks to settle the tab.
by steve smithy March 30, 2011
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10
Slapping one's own ass while jacking off to their own lower body.
The man slapjacked himself.
by ChloeV124 November 30, 2016
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11
A "homeless" person who lives on the street.The one with no teeth,dirty as hell,and talks to himself outloud while making no sense at all.Sleeps on a piece of cardboard
In downtown San Francisco,you will see many "slapjacks" on the street during the "wee" hours of the morning.
by Robo93 November 27, 2006
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12
A game similar to the classic punch buggy. Every time one sees a yellow vehicle, they slap the person next to them and say "slapjack!"

Originated from Oshawa.
-yellow car drives past-

Girl: SLAPJACK! *slaps friend*
by BillyBob the Hick July 17, 2009
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13
a woman's breasts; boobs; fun-bags
Her slapjacks were so big that they were hanging out of her top on Daytona Beach!!!!
by Cooter April 20, 2005
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