1. Literally, sleeping with them

2. Messing with them, as in playing atrick on them.
1. Dupe was fucking with someone and he caught something.

2.Fucking with someone doesn't lead to no good if they in a bad mood.
by Sharell August 23, 2005
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When you penatrate a woman’s vagian so good you go harder ubitill you come in her mouth so she swallows it and says “fuck me daddy” that turns you so you go deeper and deeper until her pussy can no longer hold your cum than bust on deep in side her anal cavity penatrate That’s the definition of fucking something
Caida was fucking Isabelle so hard she mouned and mouned Connor started to penatrate her pussy he cumed in side her then he busted a nut in her mouth that’s the definition Of fucking someone
by Pedroooo September 14, 2020
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Viciously and relentlessly attacking someone, usually to the point of visible injury.
1. Beth: "Jim just punched and tackled the shit out of Joe!"

John: "Oh shit, he's fucking him up!"

2. Dashie: Sir, listen, I don't have beef with you- *gets attacked* he's fucking me UP!

3. "Damn, I got an F on my Science exam. I feel like fucking someone up."
by The Master of Karate March 25, 2014
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Had sex with a random girl /guy had no idea about them because you were drunk
Hey bro i fucked someone
Bro who

Idk the girl i think
by That one dumb one October 28, 2019
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Celebrate april 17th by having sexual intercourse with someone that goes to the same school, universitet etc. as you.

The only limit is that they have to be attractive.
Hello math partner, do you want to have sex?

Yes of course, because it is National ‘Fuck Someone From Your Education’ Day!
by Urbandictionaryqueen123 April 09, 2021
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A very American way of saying "piss someone off" because fuck makes everything sound American.
by Matt_The_Anime_Man January 02, 2021
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