if you're under 13: you're not cool enough to know what it means. come back when you wake up and its sticky in your danger zone.

if you're over 13: why the FUCK would you need to look up the definition of "jack off?" did your balls not drop yet?
why the hell would any guy who's hit puberty need to look up what "jack off" means?
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when I was 12 I would do it 3-4x a day.
by alex December 30, 2004
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Can be used as a noun to refer to a guy who wastes time, is a complete loser, and cannot get anything done. This guy may well be popular with friends, the ladies, and whomever he meets, but has never accomplished anything and never will. Anything he has tried to achieve has ended up in disaster.
That Kramer on Seinfeld sure is funny even if he is a complete jack off.

Steve, did you complete the final report so you can graduate from high school next week?

No. I'm such a complete jack off that I never get anything done.

Smoking pot will really just turn you into a lazy jack off.
by achyhead November 22, 2005
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jack off is what most young guys often like to do.
I was twelve when my older cousin taught me how to jack off -- I couldn't cum, but it felt awesome -- and when I squirted my first load, it was unbelievably awesome!
by eda-skip June 13, 2022
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Same as "jerk off" (masturbate); also used as a noun to reference a feckless, no-account person, usu. male.

Up until the 1980s, "jack off" was considered more a Southern (USA) locution than "jerk off," which was considered more urban and Northeastern/Midwestern states. Considerable swapping around has taken place in the meantime, probably because of increased social mobility and relaxed codes of censorship.
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1)...All little Timmy can talk about is sex. If I weren't so polite, I'd have told him to go get laid, or to jack off in a corner...

2)...'If y'all boys didn't jack off so much, you might amount to something.'... (closet-case coach to members of the high-school basketball team in 1971 movie THE LAST PICTURE SHOW).
by al-in-chgo April 10, 2011
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Something preeteen boys do to feel the sensation of some real sex
Jack off, what people do while looking at porn
by ucantcme November 5, 2014
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when a male cannot find a girl to have sex with so he is forced to pleasure himself.
noah is to ugly so he jacks off a WHOLE lot
by Olivia July 19, 2004
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