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.
by chillerxoxo July 19, 2009

by the tweaker February 16, 2004

by billybobjoebobsteve September 04, 2005

any form of getting some type of action, such as, making out, feeling things, or oral pleasure or sex between 2 people. "A hook up" is whats referred to as doing those things when your not going out with anyone
Guy:"yo, i hooked up with kristin last night!"
Guy 2:"Nice, what did you do?"
Guy1:"we only got to third"
Guy 2:"Nice, what did you do?"
Guy1:"we only got to third"
by A jerzy boy December 06, 2003

Casual sexual activity. Sex while not in a relationship with eachother. Similar to a "one-night stand," but it can happen repetedly. As long as the two people are not serious about eachother, and they have sex, it's hooking up.
Me and John hooked-up last night.
Did you and Mary hook-up at the party?
We aren't going out or anything-- we just hook-up from time to time.
How long have they been hooking up?
Did you and Mary hook-up at the party?
We aren't going out or anything-- we just hook-up from time to time.
How long have they been hooking up?
by SandyCheekssss October 23, 2009

Sex for its own sake; when one or both of its participants doesn't want or doesn't know if they want a committed relationship but are horny. Usually, sex early on, especially on the first date, is the hallmark sign of a hook-up.
Dude 1: How'd your Tinder date go last night?
Dude 2: Pretty good. We got dinner and drinks and went back to my place.
Dude 1: Nice! Did you hook-up?
Dude 2: Yeah, dude. She was pretty hot.
Dude 2: Pretty good. We got dinner and drinks and went back to my place.
Dude 1: Nice! Did you hook-up?
Dude 2: Yeah, dude. She was pretty hot.
by JayMoolah September 17, 2017

When two people are making out and or having sex, which could lead to nothing or perhaps a relationship. ((pass tense))
by Jessica L. December 28, 2005
