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.
by Marty October 20, 2003
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Jack Off

To masturbate; the stimulation of a male's penis until orgasm is achieved and ejaculation occurs.
Jill didn't want to have sex right now, so Jack decided to jack off.
by Phillip Knowles January 19, 2006
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Jack Off

To masturbate.
Can also be used to unexpectedly shock people.
Grandma caught her 15 year-old grandson jacking off (masturbating) and she passed out, had a massive heart attack and died.
by chikillanto August 23, 2003
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Jack Off

1. What a man does when his penis erects into a throbbing, veiny, pulsating, kinetic hard-on, stroking the shaft repeatedly up and down with his hand until the penis barfs up massive amounts of white-nut vomit in either a clean, streaming squirt or in a gelatonous, oozing mass.

2. To make one's dick sneeze, throw up, explode, ejaculate, cough up white blood, splooge, climax, orgasm, erupt, belch, detonate, spew, or spit, possibly on another person's face.

3. A person who amounts to nothing, or should not be taken seriously.
1. "Boy, I just watched too much Full House, I need to go jack off".

2. ".. and then she got down on her knees and I jacked off all over her face".

3. "Dude, you need to get up off of your ass and quit watching gay porn, you good for nothing jack off".
by Mr. Friscus February 02, 2010
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Jack Off

Jack Off: When a male masturbates.
Fank is going to jack off in his room.
by ~Keyona January 10, 2004
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Jack Off

1. Adjective: When a person or a group of people mess around and get absolutely nothing accomplished and just have fun. No sexual conduct of any kind is made.

2. Verb: When one decides to rub their genitals; See Masturbate, Masturbation. Sexual conduct can be made.
Example 1:

Guy 1: Hey man, you should join our Rugby Team, all we do is jack off during practice. It'll be fun

Guy 2: What kind of jacking off? Throw balls at each other? or just mess around and have fun?

Guy 1: Yeah, mess around man, not masturbate

Example 2:

Guy 1 sticks hand in pants and grabs genitals

*fapfapfapfapfap*
Guy 2: EW MAN THATS GRODDY!
by whathe12 November 12, 2011
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