Sponge Jack 

A person who, when a joke is told and doesn't hear it, still laughs to try and fit in and once this person is told the joke they constantly repeat it and piss off everyone around them.

"Jack Gallop is so annoying. What a Sponge Jack!"

Sponge Jack by MenacingMeerkat May 15, 2016

Willie Jack 

To drop food on oneself while eating, particularly when the mess is visible to others.

Did you see that guy eating his dinner? He did a massive Willie Jack!

Willie Jack by MetalMayhem666 August 12, 2019

Schmegtastic Jack Martin 

A term often used for someone whom possesis a extreme amount of Schmegma

That lad over there he’s a full on schmegtastic jack Martin

Schmegtastic Jack Martin by TheDogFondller May 28, 2020

Pepper Jack Penis 

A white (often pale) member, that is covered with multiple forms of sexually transmitted diseases, thus giving it the look of a block of pepper jack cheese. Especially common in uncircumcised members of the male population who are known to have higher rates of sexual diseases, and if unwashed can accumulate a cheesy residue.

"Have you seen Willy's junk? It's totally a pepper jack penis"

Pepper Jack Penis by Richard Queso November 29, 2012

hit my jack 

Text my phone, hit me up.

Aye sis , hit my jack later on today.

hit my jack by adarat March 28, 2017

ballsack jack 

When you are walking down the street on a fine day and out of the bushes beside the road a gentleman jumps out and tears off your ballsack. Your ballsack has been jacked.

Hubert: AHHH, what a fine fresh day, birds are singing, the ice cream man is humming a jolly tune...

Ballsack Jacker: RAH Gimme that ballsack

Hubert: Well tarnation, a got BALLSACK JACKED

ballsack jack by dildinosaur November 20, 2009

Combat Jack 

Combat Jack is generally known amongst military personal as masturbating during wartime. It was the name of an episode of Generation Kill, in which we see various soldiers in the platoon "relieving" themselves in humvees or while sleeping.

Other slang terms- Rub one out, jack off

From Generation Kill--
Soldier- Where did you go?
Reporter Evan Wright- I dont know..i was trying to find a secluded place..
Soldier- Combat Jack??
Reporter Evan Wright- No...i was trying to take a shit and ended up by the front gate, then everyone started shooting.

Combat Jack by generation kill a ni66a April 12, 2009