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short for 'bien tai', which in mandarin means perverted, deviant, abnormal.
dude why u gotta be so bai?
by smocata July 30, 2003
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2
a westcountry originating term for boy.
a statement for expressing ones excitement, enthusiasm, admiration or even happiness.
ARRRIGHT BAI??

(someone has done something impressive)
GEDDON BAIII!!
by glen55wa February 28, 2011
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3
Another way of saying "good-bye," or "bye."
Why it is spelled in such a way is beyond me, but it is catchy. The word bai is used in the famous internet phrase "kthxbai."
by Kylezors August 19, 2008
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4
1. a more efficient way of saying "farewell" and "fuck you"

2. an extremely effective word used to win any argument (best used when all other insults have been said + especially effective when said to parents)

3. an alternative way of saying "My name is ______. I'm __ years old, and I don't give a f*%k."

5. fruit juice full of antioxidants
Brett: You are a repellent, ball busting, fart taster.
Jake: Yeah, but yo mama is a revolting, heavily built, cock monkey.
Brett: BAI.
(Brett therefore wins the argument.)
by cusp February 10, 2011
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5
bastardization of 'Bye,' widely uttered by net whores and chodes
Chloe says:
g2g bai

Chimu says:
Speak english, biatch
by bastardized bottomburp March 23, 2003
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6
A Filipino slang (Cebuano) meaning friend, pal, homeboy, homie, etc.
Sup Bai, how u doin'?
by Shahram Senerpida November 24, 2008
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7
Slang substitution for "boy" used in the countryside around Northern Ireland. Usually used in a greeting,
Greeting- "Awrite, Bai?"

Further Examples, "I was in Starbuck last night, bai. One of the waitresses smiled at me and I says, "Awrite girl?" She says, "Awrite bai?"
by Whu Flung Dung December 27, 2009
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