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A sarcastic way to say "fuck you". Mostly used on chat services such as IRC and other sites that have chats. It's not meant to be taken seriously, so keep this in mind.
Person 1: Wow this is so stupid
Person 2: fuk u
Person 1: no u
by LucasRCD July 31, 2016
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A chinese restaurant located in SF.
Dude: Hey! Fuk U?

Badass goodlooking piece of a hot woman: Fuck off! *Smack*

Dude: *wraf*
by Fessus Fessheim August 09, 2006
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Can typically start any internet rebuttal (There are exceptions, usually based on common sense) and sometimes ends with 'Also, Penis.' for an attempted humorous twist.
InternetGuy1: hay u faggt
internatsdood23: fuk u.
internatsdood23: Also, Penis.
by Raggs July 31, 2008
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The April 2018 Coalition of Nations composed of France, the UK and the US that bombed military installations Syria in retaliation against Bashar Al-Assad's use of poison gas on rebels in the Damascus suburb of Eastern Ghouta, giving lots of advanced warning and killing nobody.
"You mean we launched $400m worth of cruise missiles and Putin still isn't afraid? Oh FUKUS."
by thekit April 17, 2018
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An informal way to say "goodbye and good luck with whatever you're trying to accomplish" when you're so flabbergasted by an individual's or group's words or actions that you only have 4 letters in you. Not at all related to profanity or the work "fuck"
Person: Donald Trump would make a great president.
Logical human: fuk u
by RT4T January 02, 2016
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