Jack's Sister 

A dirty liar who will tell you she's 13 just to sleep with you when she's really only twelve. She'll say that she loves you but really she only wants you for sex. Then she'll rip your heart out by leaving you for an older guy.

Did you get laid this weekend?
Ya, I slept with Jack's Sister!
She's just toying with you man.
She said she loved me!
She told me that to... Last weekend.
........oh.......
It's gonna be okay man... It's gonna be okay

Jack's Sister by Jack's Sister August 4, 2008

jack the ripper 

This fuckin sweet guy that used to fuck people the fuck up and tear them apart and shit..

He was fuckin awesome

Hahaha holy shit did you see that bitch that Jack got to?

jack the ripper by Advil April 7, 2004

jack-knife 

Having deposited your turd in the toilet, you look back to discover that its poking out of the water, too long and solid to go round the u-bend.

I had to go and fetch a stick so I could break up the jack-knife and flush the little devil.

jack-knife by n_m April 1, 2004

jack ballin 

Gettin a few balls of smokable drug and invitin the ho's to join in. Ends up the ones with the dope tell the ones without what to do for hits. Winds up being sex for drugs till ya run out.

lower the jeans and spread em for a while bitch.
Hike the skirt and crawl to that wall Come on back smoke my sausage then smoke the glass dick. Where were ya last night? We was jack ballin some girls from 12th street over at lennys house.

jack ballin by thik December 27, 2008

jack in the box shit 

a crap you have been holding in all day and as soon as you get home and sit on the thrown one quick push your done and the bowl is totally full.

" I had to take a dump around noon but waited til I got home at 5, I sat on the crapper one push and it was the old Jack in the box shit.

jack in the box shit by Mark W Stack January 16, 2008

jack in the box 

to masturbate in one's cubicle instead of working.

slave to the man #1: "Work sucks."
slave to the man #2: "At least we can still jack in the box."

jack in the box by j-moné December 28, 2005

jack-off 

Someone who does not focus at the task at hand and instead messes around. Also can refer to someone who enjoys masturbation.

Today in study hall Johnny was a complete jack-off.

jack-off by TheRockstar July 14, 2007