FU 

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.

FU by Drüd October 19, 2008

fu 

a vietnamese noodle dish, that is bomb as hell, and you eat it with greens, bean sprouts, and hot green peppers.

I'm tired of top ramen. Let's get some fu!!!!

fu by ChrisissoooooooooCool October 12, 2004

fu 

Short for:

FUCK.
FOOL.

"FU u best b walkin'"
"FU ill kick ur ass"

fu by Da Shizzle December 23, 2003

fu 

The perfect stem of the verb "to be" in Latin-- Sum, esse, fui, futurum.

Latin teacher: What's the perfect stem of "sum"?
Student: FU!

fu by Ladey Casey September 12, 2004

FU 

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

FU by fACT10n September 14, 2008

fu 

WWE Wrestler John Cena's finishing move.
See also 'Stfu'

"Look at that. Its the FU!"

fu by Ben Parker January 13, 2008

FU 

A very shitty wrestling move. It is nothing more than a body slam.

The FU is a shitty finishing move.

FU by Yo Momma January 13, 2005