Jack-off 

A person who prevents everyone around them from discussing the finale of "Lost" because they haven't watched it yet. The prefix "Jack" comes from the first name of the candidate Jack Shephard. The suffix "off" refers to the person being a jerk-off.

Co-worker 1: Holy cow! Did you see "Lost" last night!

Co-worker 2: Shhhhh! This Jack-off dvr'd it last night and watched the ball game instead. We'll have to talk about it tomorrow.

Co-worker 1: What a jerk-off!

Co-worker 2: You mean Jack-off.

Co-worker 1: Yeah, whatever.

Jack-off by mondo270 May 23, 2010

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

jack-off 

An idiot who is generally disliked by the majority

Jesus, that guy Tom over there can be a real jack-off

jack-off by foreplayman February 22, 2019

jack off 

reason my right arm is much bigger than my left

Kid to anothr kid: holy shit! look at his arm
another kid: omfg
(they sees his left arm)
kid: ohhhh.....he probbly jack off
anothr kid: lets add that to our arm workout bro

jack off by jjtheblack October 1, 2011

Jack Off 

stimulating your penis with your hand to cause orgasm and ejaculation. Male masturbation.

Brian had the blue balls so bad he had to jack off as soon as he got home.

Jack Off by Marty October 19, 2003

Jack Off 

to get off by rubbing your dick

I love to jack off to porn!

Jack Off by a sd fgd jdxfgh sf October 5, 2005

jack off 

To play with your dick until you cum.

I had to jack off, because I had the massive blue balls.

jack off by Jack Balls May 11, 2004