playing jack in the box 

sex
penis=jack, vagina=box

after the party i went over to jill's and we stayed up all night playing jack in the box

playing jack in the box by jojo548 December 16, 2008

pull a jack ass 

to harm a friend for laughs.normaly found funny only by the person who pulled a jack ass and after words is normaly severly injured by the person who he pranked

i got a drunk the other night and mike had to go pull a jack ass and shaved my head in my sleep when i got up i beat him to a bloody pulp.

pulling a jack ass can be funny if the pulled jack ass will only effect the person for a week or so go ahead shave your friends eye brows in his sleep take pictures of u farting in his face just remember if u do somthing that will effect the person for a long period of time he'll either beat u to death or charge u with assault i've seen it happen.

pull a jack ass by jack ass hater January 15, 2007

Harness Jack 

To jack off while parachuting.

Bob: Hey dude, lets harness jack!
Jim: Alright!!

Harness Jack by Moskau September 23, 2005

window jack 

The act of masturbation while resting your chin on a windows seal and watching your neighbor lay out in the sun. All the while, dressed in nothing but a 1985 pair of terry cloth running shorts cut so short that simply sitting on the bed exposes a hint of your grundel and nut bag.

"Man, my mom caught my brother window jacking the other day. He must have been mesmerized by her bikini spider."

"Dude that's tore."

"Yeah, he couldn't put it away fast enough because he was giving himself the shocker at the same time."

window jack by liquidnails May 13, 2006

Myspace Jack In The Box 

When a person looks good in Myspce but when you see that person in real life looks ugly as shit.

She looked prettier in that pic but in real life? man I almost threw up
-Myspace Jack In The Box

Myspace Jack In The Box by LA Lakers March 20, 2008

alex jack 

a guy from toronto who is better than kristen

whoa! alex jack is way better than that loser with the k name!

alex jack by helmuth October 9, 2008

Capn Jack Sparrow

A Modern Warfare 2 free for all gametype created by Conor Boyle during summer 2010 (before black ops announced their 'one in the chamber' gametype) where all the players must start with a magnum with any attachment. Players must shoot all ammo out until they have as many bullets as there are people in the game BEFORE moving (so if theres 4 people including you, you have 3 bullets) and you must kill them all with 1 bullet each. you may pick up a persons ammo after you have killed them. Game ends when all players are dead except one. And while playing the game you must run around saying "YERG!! Im Capn Jack Sparrow! Yerg!!" as a reference to pirates of the carribbean

Michael: What game should we play?

Conor: How about Capn Jack Sparrow?

Michael: Fuck no.

Capn Jack Sparrow by TastiestFoot September 20, 2010