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?
by SandyCheekssss October 23, 2009
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1) to get together with someone with the intention of dating or having sexual relations with them.

2) to meet up with someone to hang out.

3) to "hook someone up" means to provide that person with some kind of item or service, often of an illegal nature.
1) "I hooked up with my girlfriend when she used to live next door to me."

2) "We'll hook up with you guys later at Cassidy's."

3) "Hook me up with an Alpine sometime if you can."
by hipster April 18, 2006
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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.
by JayMoolah September 17, 2017
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Yanks use 'hook up' differently to the rest of the English-speaking world. They use it in a sexual context or providing an item for somebody that's usually dodgy. Everyone else uses it in the context of meeting someone.
Hook up:

1) I hooked up with him in New York. We made love all night!

2) Hey! Hook a brother up with some dope!

3) I hooked up with my mate in London. I hadn't seen him in years.
by Cortez The Killer November 23, 2007
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There are so many different definitions to this phrase...

1) To go out with; date

2) To make out with, without dating the person; not considered cheating

3) To make out with, without dating the person; considered cheating

4) To have sex with

5) To recieve a great favor/deed done for you

6) To go out with a person (on an outing, not considered dating)
1) I wanna hook up with Nina!

2) Jessie and Fred hooked up last week.

3) Gregg was pissed off when he found out Morgan hooked up with John

4) Chelsea and Pete hooked up at a party and Chelsea ended up getting pregnant.

5) Thanks for hooking me up with these concert tickets!

6) I saw my old friend Tammy in the grocery store, so we hooked up and went to the mall to hang out.
by Ryly Shea July 24, 2008
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Ramen noodles with any and every ingredient in it that your institutionalized (jail, rehab, mental hospital, etc.) heart desires.
I got the hook up yo!
by Madeleine Lee July 24, 2006
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A completly unemotional sexual act done for the sole reason that it feels good. This can range from making out to sex and everything in between. You do not call hook ups back at a a later time and ask to go on a date, and ususally they are spontaneouse, so dont call back looking for more action either.
I was hitting on this hot lifeguard and she took me into the pump room and blew me, it was a great hook up.
by am i metro? September 27, 2006
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