John Cena's finisher move (came before the STFU).
He came up with this name when he was in a fewd with Brock Lesnar, whose finisher move was the F-5.
Also an abbreviation of 'F*** You.'
"Yo, Brock, your finsher's the F-5 - well, mine's the F-U!!

Person 1: (gets nudged by bypasser) Aww, F-U!!
Bypasser: Dammit, just say the word man!
by Greg A Woodin August 5, 2007
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2 possible notations in the algorithms for a mini, rubiks, revolution, and professor cube. In other words it's termonology for the 2x2, 3x3, 4x4,....AxA rubik's cube.

There are other notations such as R and L (right and left). Adding a lover case I (i) after each notation means it is the inverted notation (opposite).
F R U Ri Ui Fi is an algorithm for the rubik's cube. F U are 2 notations in the algorithm.
by Neilzy January 4, 2008
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an abrevation for Flute
Niki: hey you know what? f u !
Tino: flute?
by t.i.n.o. December 30, 2005
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F U! F U! F U! F U! F U! F U! F U! F U! fu!
F U SAUCEY! F U SAUCEY! F U SAUCEY! fu!
by Balls!™ April 12, 2005
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When you flip someone off after giving them a square hit to the jaw.
Yo man did you see Larry last night?! He punched a nigga in the jaw then flipped him off! He totally Kung F-Ued him.
by DDSavage January 1, 2016
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From the web series Red vs Blue, Caboose's keyboard shortcut at command for every time he team kills.
Washington: "I told them Caboose did it. Apparently they already have a shortcut on their keyboard for recording his team kills"
Caboose: "Ctrl+F+U"
by confusedfish January 8, 2010
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umm wat they sad but im here to be on internet again soo... umm... hi oh yeah f u
f u u stupid bum get ur own money
by amado February 14, 2005
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