One (male) who in conversation with a fellow, workmate etc is inclined to grab the other guy's crotch suddenly and without warning. The object is ostensibly to put the victim ill at ease and in a state of embarrassment. However, one wonders if it's simply an excuse to grab other mens' genitals.
Tony: I hate talking to Mike. I'm in the middle of a sentence and he just grabs my dick every time
Stan: yup, he's a cock jacker to be sure
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n. Someone who hi-jacks your hum half way through
First individual: hum hum hu-
Second individual: hum hum hum
First individual: You are such a hum jacker!
by Trent Naidu June 13, 2017
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One who creeps around or sits in sight of another to get a free shot for their sexual pleasure.
That peep jacker just looked down my shirt.
by #1BAM March 19, 2021
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Some asshole who comes and steals your thoughts and turns it into their life's work aka Blaqadomas
Some fool who jacked my account and took credit for Cracker naggle then came up with a stupidass word. He's one of those mental jackers.
by The Original Blaqadomas April 27, 2018
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Is when there are so many people who would rather eat out, then eat at there house. It appears the community members have no oven at home.
Damn the Taco He'll has been so busy today. Damn can people not go home and make there own tacos? (person 2)I guess the "Oven Jackers" came through this town again.
by Ds89 December 20, 2010
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An overly competitive alpha-male who refuses to accept defeat; or when defeated, is a total bitch about it, see also veenus master.
Once Tyrone lost by a free-throw, he's been nothing but a closet jacker in all our pickup games.
by Chuck Denniston October 6, 2018
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