Top Definition
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
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
A random object. Easily intertwined where the speaker is too lazy to insert the correct noun
"Just throw that foos anywhere"
"WTF is all this foos?"
"Throw me a porn mag and some foos"
"Don't make me kick u in the foos!"
"Where did I leave all my foos?"
"Goddamn foos!"
"Mmmm this is some tasty foos!"
by Mark D (Foos) August 31, 2003
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
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
Short for fool, as per Mr. T.
"I pity the foo who..."
by slice32 April 18, 2005
someone who is foolish
derived from the word fool
god damn you are one foo
by Daniel Morley February 12, 2004

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