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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)
von ISL Slang Master 6. Februar 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..
von audschrismalizdeepsnayo 4. November 2009
 
24.
foo
what the foo fighters fight
the foo fighters fight foo
von futuramafan 4. März 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.
von Neocoo 8. August 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!"
von kaili 20. Juni 2004
 
27.
foo
that what must be fought. see foo fighters
Dave Grohl makes a living fighting foo.
von Seth Nicaragua 6. Februar 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
von foo fighter 23. Mai 2005