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To instruct a fellow jackoff(n) to continue jacking off(v), despite himmerself's better logic.
by Pillup March 05, 2006
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Apr 16 Word of the Day
"allow it" means to just leave something alone, or don't worry about it. People in West London say this quite often.
Ahmed: Wanna walk to the station?
Joseph: Nah, allow it blud, can't be arsed, I'mma get the bus.
by ak47 February 27, 2004
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The art of jacking on is a much unknown art lost long ago in the Roman empire
Archieologists have discovered several requirements for jacking on by studying scripts from roman murals
the requirements are as follows
1.Strong left leg
2.Slightly short middle fingers
3.a high pain thershold
4.6 foot 2.5
we would ask anyone with these qualitys to ontact their local museum and ask about the phenomenon and then ask were they can go for testing into these qualitys in relationship to curent reasearch
"Oh man last night i had the biggest jack on last night and I nearly broke my left leg as it wasnt strong enough"
"That totally sucks!"
by Jack onner September 17, 2007
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to get a jack on,
to walk so closly behind someone as to invaid their personal space.
treading on another mans heel
*one guy treads on anothers heel*

"oi!, whats this?? getting a JACK ON are we?"
by stonerchris January 24, 2008
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To reverse ejaculate, using your penis to suck in the semen like a vacuum cleaner.
I heard my parents coming to my room so I quickly had to Jack On
by Will_I_Am23 November 16, 2020
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