Jack's Mannequin

The perfect shade of "dark blue." Which may or may not be found in a box of crayons.

Oh, would you look at that? Tonight's the prefect shade of Jack's Mannequin.

by Kerosene December 23, 2005

Jack Knob

a moron, Jack ass ,door knob, fool

Dude, you put the key in the IGNITION Jack Knob

by LSULSUJOE October 25, 2006

air jack

the hand gesture associated with actual jacking off; like air guitar only air jacking off

jake and i simultaniously air jacked all over levi's face and gave him an air facial.

by cheweysmoker August 10, 2008

Jack Spicer

An evil boy genius from the excellent Y-7-rated cartoon Xiaolin Showdown. He invents different kinds of useless attack robots and is highly failure-prone and -phobic. Looks kinda Goth.

That Jack Spicer's a bumbling, Goth-lookin' evil boy genius.

by 'Annony' June 01, 2005

jacking off

rubbin ur penis wit ur hands or objects
it feels wicked good but its not as good as pussy so guys do it when theyre not gettin any

all guys do it like evry day im doin it right now

by billy bob December 15, 2003

jack shit

1) A term most commonly used for when people describe that they don't know, or have not done anything.

2) Probably the name of some guy somewhere, who i'd -really- like to meet.

Bob: "Bill, what do you know about egg products?"

Bill: "Heh, Jack shit, Bob."

by Meik April 02, 2003

Jack FM

A radio station
A computer.
An automation software.
Bunch of 60s-Current Hot AC, Classic Rock, Disco, Pop loaded into the computer.
A guy named Guy Zapoleon telling the stations what to play.
Howard Cogan blabbing the station's name in between songs

104-3 Jack FM
92-5 Jack FM
101-1 Jack FM
97-9 Jack FM
93-1 Jack FM
100.3 Jack FM
We Play What We Want

by 1069 May 17, 2006