Déjà Foo 

The experience of feeling sure that one has already heard a "new" Foo Fighters song, stemming from the bland, generic, and repetitive nature of Dave Grohl's songwriting.

Guy #1: Hey, what do you think of this new Foo Fighters single?

Guy #2: New single? No, you're confused, that song came out in the 90s. And then again in '05 and again in '09. Dave Grohl loves rereleases.

Guy #1: You've got Déjà Foo, buddy.

Déjà Foo by ErikLensherr September 5, 2011

dang foo 

Used to express surprise or complete hatred.

Dang Foo!! You jacked up my car!

dang foo by Matt March 14, 2005

coo foo 

in lamen's terms cool fool

aight that's coo foo

coo foo by yomammafoo August 8, 2003

foo dog 

A pair of chinese statues usually placed at the entrance of a building to ward off evil spirits. One has its mouth open to suck the spirits in, the other has its mouth closed to trap them.

There were a pair of foo dogs sitting at the entrance of that chinese restaurant

foo dog by FinalPhoenix February 14, 2004

Foo Fighters 

The best band in the world today. End of story.
Also a WW2 term for an "Unidentified Flying Object"

miff - "hey patto, foo fighters are better than any band aren't they?"
patto - "they certainly are."

Foo Fighters by tataa March 29, 2009

foo 

Kung fu means skill from effort.
Kung foo means skill from bad-ass programming powers.

$foo is used extensivly in php as a generic variable.

"This is my kung foo, and it is strong."

$foo += 10;

foo by Skara March 22, 2005

the foo fighters 

this band kicks royal ass...

i love the foo fighters

the foo fighters by T0m March 5, 2004