verb: to engage in any type of sexual activity.
noun: 1. purposely ambiguous, equivocal word to describe almost any sexual action. usually used to exaggerate or minimize what exactly happened. a hook-up can range from a make-out session to full out sex.
2. person you hook up with
a: "so what did you guys do last night."
b: "welll, you know...we hooked up."
a: "come on! that could mean anything. give me details!
by nerm November 7, 2004
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Nobody knows exactly, can be anything from holding hands to having anal sex. Pretty sure it drives most normal people insane
Bro: yo did you hear, hoe from our school hooked up jock?
Me: No. What did they do?
Bro: They hooked up
Me: Okay but bro, like, what the FUCK DID THEY DO?
Bro: How the hell should i know, i just heard they hooked up! fuck

(and now i searched for what it means on UrbanDictionary.com and still couldn't find an answer)
by Bob Marusi October 10, 2011
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Hooking up with someone, making out with them, but not going all the way. Regional usage; note that "hooking up" may mean you went all the way in some places.
"We hooked up last night"
"John and Katie hooked up at the party"
by your mom March 11, 2003
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to join together, to acquire through ceretain channels, to obtain, to fuck.

Usually in reference to drugs, a good deal, or getting laid.
"I need to call my hook-up."
"Go call your hook-up."
"I gonna get my hook-up tonight, yo."
by deathtobees February 18, 2004
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to have sexual pleasures (making out, fingering, oral, or sex) with someone your not going out with, or no strings attached. can happen mulitple times, with one girl.
"dude, you gotta hook up with Kaley tonight at the party."
by chillerxoxo July 19, 2009
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Connections.Contacts.Also deals or arrangements involving drugs mostly.
I was such a crackhead i had to put my list of hookups on cd rom.
by the tweaker February 16, 2004
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depending upon the region it generally means two people either made out or fucked.
"Did you hear about Mary and Joey? They hooked up last weekend"
by billybobjoebobsteve August 4, 2005
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