A surprise or planned fight, when either (a)one individual is attacked/beaten by a group of 2 or more individuals or (b) when a notiably larger group attacks/fights a smaller group of individuals. These fights can occur with or without any kind of valid reason to jump someone.

A onesided fight.

verb jumped
"Man lets jump this kid coming this way on his bike"

"Me and my cousin are going to jump this guy that stole our car"
by DetroitSlang May 14, 2003
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1. to fight(often applied to street gangs, especially denoting a surprise attack)

2. to attack or assault

3. to copulate with
They tried to jump those punks over there.
by The Return of Light Joker February 20, 2008
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to use your legs to propel yourself off the ground.
I can jump into the air
by Dude 2000 October 16, 2003
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To want to have sex (or make out with, or anything along those lines) with someone. It is usually said more in the figurative sense, rather than literal.
ex. Your brother is hot, i want to jump him.
by catttty February 26, 2006
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Random attack usually by a group of individuals on a lone person.
Rudeboy1: Im bored
Rudeboy2: Yeah me 2
Rudeboy1: Ha look at that t**t
Rudeboy2: Lets go jump him
by XD yeahhh July 25, 2005
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n. A shag, fuck, intercourse. Most common in northern UK, especially since "Rita, Sue and Bob too".
"Reet, yer fancy a jump?"
by markyspeaks February 9, 2005
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Physically Straining activity, causing you to fly for a very limited amount of time.
May cause heavy breathing and in extreme cases(when doing it twice)exhaustion
by Schteen May 21, 2003
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