look up any word, like fluffer:
 
1.
foo
An term used for unimportant variables in programming when the programmer is too lazy to think of an actual name. The origin of such word is described in detail in RFC 3092.
int foo;
foo = 2 + 2;
cout << foo;
by Dahhak July 20, 2004
 
22.
foo
Shape of mouth used in Irish Sign Language (ISL) by Deaf signers with following sign: fist ('F') at chin level shoots forward the fist sideways with index and long finger out in shape of gun barrell ('OO').

Used to describe someone who:
i) Tripped up big time - unintentionally;
ii) was easily lead on;
iii) believed a cock and bull story;
iv) holder of Darwin award
As signed:

'FOO' (laugh unbelievingly)
'YOU FOO' (look disgusted or sneery)
'HE FOO' (roll eyes at man admitting he was take in by some womans bullshit)
'SHE FOO' (look up and down fallen drunk woman in amazement)
'FOO?!' (Shake head in disbelief)
by ISL Slang Master February 06, 2004
 
23.
Foo
When somthing is Dysfunctional, or not working properly. If something/someone is not "normal."

If something or someone is odd in behavior, action, or just existance
Out of the ordinary
1)Gosh, why is this computer not working...its being so FOO.

2)That clock is so Foo, its tilted 25 degrees off center.

3)Why are there 4 coffe cups full of water in that microwave? Foo much..
by audschrismalizdeepsnayo November 04, 2009
 
24.
foo
what the foo fighters fight
the foo fighters fight foo
by futuramafan March 04, 2008
 
25.
foo
A high class sophisticated socialite. Term of endearment in the work force.
Where's our foo? Is she in another meeting?

Our Josi-Foo's out to lunch, schmoozin with the upper crust again.
by Neocoo August 08, 2007
 
26.
foo
short for "phooey"; term used when something goes unaccording to plan or when something unexpected happens.
"Foo! That wasn't supposed to happen!"
by kaili June 20, 2004
 
27.
foo
that what must be fought. see foo fighters
Dave Grohl makes a living fighting foo.
by Seth Nicaragua February 06, 2004
 
28.
foo
stuff fought by an awesome band called foo fighters
dude: man they are kicking the shit out of that foo
dude2: wtf is foo?
dude: your mom is foo, now shut up and listen
by foo fighter May 23, 2005