jack rolling

This is the name applied to a crime born in South Africa's townships where men gang-rape their victims in retaliation for a perceived slight.

Women in the Midlands town have been urged not to go out alone after dark due to a wave of so-called "jack rollings".

by Dave Eietz September 5, 2005

slow jack

To masturbate at a reduced pace. Sometimes performed for hours at a time.

"Yo man, slow jacking has so many benefits. Why just the other day I was cooking while I jacked, try the oven mit, it's just like givin' yo'self a stranger."

by Billabong aka Buck-deezy February 16, 2006

jack knife

When a trailer being hauled loses traction and begins sliding to the side of the vehicle that is hauling the trailer. Similar to a rear wheel drive vehicle fish tailing and losing control.

Passenger: Dude you better slow down on that turn, its pretty icy out there.

Truck Driver: You're right, I wouldn't want to jack knife and cause a wreck.

by afrojim2009 June 16, 2010

Jack

Nothing. Used to describe what a person is incapable of doing or what a person has no clue about either by learning or experience.

Broadly equivalent to Jack Shit, Diddly Squat, etc.

Guy1: I know that Obama is a communist and a muslim. He is also not a citizen.
Guy2: Yeah, what's your name?
Guy1: Jack
Guy2: Yea, Jack. Don't know Jack.

by blueliner49 February 7, 2010

jacking off

rubbing the penis so he spits up his cum

what I'm doing as I'm writing this, oh man just ejaculated everywhere

by I'm jacking off September 7, 2003

jack goff

masturbation.

Jack Goff: fap fap fap fap fap fap

by TheMessiah04 April 19, 2016

Jack Disease

A terrible disease which makes the victim appear 30 or more years older in appearance than they actually are in numerical age. The name comes form the 1996 Robin Williams Film ``Jack``There is no known cure, although smoking at least 3-4 large marijuana joints per week has emerged as a well documented preventative measure.

My friend`s 22 year old girlfriend appears to be in her sixties due to an ungodly case of Jack disease.

by Jackdisease survivor January 5, 2011