Slipjack 

A prison term for placing ones weiner between another males lubed butt cheeks, squeezing them together like boobs amd proceeding to hump vigorously. Also know as the bro slide if you're not incarcerated

Ron
Man this prison shit is for the birds. I almost wish I was gay.

Phil
I have a way we can do it and not be gay. It's called the slipjack. You want to give it a shot?

Ron
Hell yes! I've been wanting to slipjack them cheeks for a year already! Let's get it on!

Slipjack by SnowmanND December 18, 2018

Seattle Slapjack 

When the penis is removed from the oral cavity during fellatio and the recipient graciously ejaculates into one's own palm. The person providing fellatio is then slapped with the semen ladened palm, spreading the viscous emissions across the face. Generally considered a demeaning act.

He was delighted that his partner pulled out of his mouth prior to ejaculating until suddenly he found himself the recipient of a Seattle Slapjack.

Seattle Slapjack by Truckdriver April 14, 2009

Slapjack

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.

Slapjack by BWeezyAflo January 2, 2011

Arizona SlapJack 

The act of slapping a woman after intercorse with a used condom.

"Dude, I gave her a nasty Arizona Slapjack when I was done. it made the plop noise and everything"

Arizona SlapJack by JoeGrizzly October 21, 2011

dildo slapjack

A giant douche that owns all the trendy gun things, like defcons, supdef, HK pistols, and lots of one off lower receivers, and drinks only Tim Hortons coffee and drives Subaru’s.

That guy is the literal definition of a Dildo Slapjack, what a douche

dildo slapjack by Alex Krycek June 2, 2019

Slapjack

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.

Slapjack by Box of Wood Spiderz November 25, 2020

Slapjack

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.

Slapjack by marydelta August 20, 2011