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 03, 2008
The element symbol of Colbertium.
I've got two letters for scientists: Fu! -Stephen Colbert
by BF Torchman April 07, 2011
FU can act as an adjective describing units in RTS games. It stands for Fully Upgraded. Mostly seen in forums, rather than in games.
person1: Of course British Lifeguard Hussars beat French Hussars, they are royal guard units ffs.

person2: Not when fully upgraded noob. The French can increase their hand cavalry attack by 15%. That boost means that FU French hussars beat FU British hussars.
by Drüd August 31, 2008
1. The equivalent of the word fuck when you're attempting to keep your mouth clean around parents, young children, etc.

2. The fu in kung fu. 'Cause we're fucking cool like that.

3. The equivalent of the word fun, when you're still attempting to have a literate conversation while suffering from hapyp (good luck with that, kids. Trust me, I've tried).
1. Oh, hello mom. -stubs toe- AHHHH FUUUUUUUuuuuuu....

2. Oh yah, man. We're gonna do some Kung Fu 'cause we're so cool.

3. Yeah, we're gonna have some fu today.
by Sonny Pestilence August 22, 2006
Pronounced (foo) An exclaimation of disgust when someone screws up or messes up. Also used to berate individuals with no P&D.

Its antonym is Jix.
How in the hell did he manage to screw that up. Fuuuu

you are such a fu.
by fred_berg December 12, 2009
short for fuck you!
Jeff:OMG I Fucked Ur Mom!
by Seagulls Of Santa August 09, 2008
A term used in RTS games to describe a particular unit as "Fully Upgraded" , i.e. it has been upgraded to the maximum level.
Player: OMG he's attackin me with those Roxxorz FU jarls.....
what do i do?

Team mate: GG
by fACT10n August 21, 2006

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