buy-jack 

When someone buys your a present, thereby forcing you to buy them one in return. Especially at Christmas.

My girlfriend bought me a Christmas present, totally buy-jacking me. Now I have to go get her one.

buy-jack by W Gville December 17, 2008

compton jack-o-lantern 

an empty old english malt liquor bottle with a glow stick inside.

the street was marvelously lit up with compton jack-o-lanterns as the little kids went trick or treating.

compton jack-o-lantern by rodman2000 November 23, 2009

gets jack 

Fed up. Had enough of something

What happens when she gets jack of you being such a sook?

gets jack by Rainer67452 November 27, 2013

Mad Jack 

The dark and evil counterpart of Samurai Jack. He only appeared in one episode called ''Jack VS Mad Jack''. Mad Jack is a badass, a samurai, an illusion, a clone and a master of all fighting skills. He is also mysterious and rowdy.

Mad Jack is cool but he's so angry

Mad Jack by CollectorofSouls November 11, 2014

The Jack Russell

The act of vigorously shoving your dick into someone's bum,

"I'd give her The Jack Russell, lad"
or
"I'd be up the back of her like The Jack Russell"
or
"I heard John give Amie The Jack Russell, last Friday"

The Jack Russell by ZPL400 January 23, 2015

to pull a Jack Bauer 

To work for 24 hours straight on something.

"Dammit! Database project for tommorow. I'm gonna have to pull a Jack Bauer to finish it!"

to pull a Jack Bauer by Solitary May 29, 2007

Slip 'N Jack

You and your girl are in the shower, and you don't really have much room to move around. So you both sit down facing each other. Her legs go over yours and you're sitting with your genitals next to each other. You take your dick and put it in her pussy. Then you proceed to move your dick with your hand in a jacking off motion in her pussy. Hence the Slip 'N Jack.

Mostly used in the shower, but also possible in a hot tub or a pool where you can't move much. Slip 'N Jack

Slip 'N Jack by Scruffs June 20, 2009