"foo" is frequently used by black gangtas as an abbreviated form of the word "fool".
It is sometimes used in a non-offensive way.
"Foo, you scored up ma ride!"
"You better watch yo'self, foo"

"Sup bro, how you been doin', foo!"
by puttytangman May 16, 2005
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short for fool. Like calling someone a fool, but they are so stupid they don't deserve the last "l" so you just call them foo.
That foo stuck his finger in the flame to see if it was warm.
by Lauren R April 22, 2008
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Any living being that Mr. T pities under given circumstances defined by Mr. T himself.
Mr. T: "I pity the fool who tries and takes over the world"
by GoShogun March 24, 2005
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a person who thinks he is ghetto, but in all reality, is absolutely not.
by DeedZeastside August 23, 2007
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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 6, 2004
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Solitary ingredient of weight-watchers' Egg Foo Yung.
Use no egg, use no yung. Sprinkle with foo and serve.
by baldpuss January 26, 2005
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