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Actually IS also the Japanese for "bye-bye". As anyone who speaks any language on Earth knows, there are a number of ways to say "goodbye" in every language -- and "sayonara" is but one in Japanese (and a pretty stuffy one, at that).

See ja.wikipedia.org/wiki/バイバイ for concrete evidence.

Hey everybody, let's not talk about things we don't understand!!
じゃあね、バイバイ! (Jaa ne, bai bai!)
bai bai by suejak June 11, 2010
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Japanese for bye bye. Mostly used by MMORPG gamers because everone understands it and it looks Kewler.
'Damn man, gtg to class'
'kk, cya l8r bro'
'bai bai'
Related Words
baibai • bai • chi bai • boom bai • Bai Marin • chee bai • Hey Bai • ji bai • ai bai • Aye Bai
THE HOTTEST BITCH ALIVE people see her in the streets and wish they could aproach her but she only has one best friend who she cherishes more then anything usually named julia but she is the giver of nick names and is a strong believer in 80s music
Did you see that girl at McDonald's earlier? Yeah she was definitely a bai bai
Bai bai by Cheergeek22 August 17, 2017

er bai wu 

er bai wu, pronounced AR-BUY-OO in Mandarin Chinese, is translated literally as the number 250 and is a slang term for a very, VERY stupid person. This is widely used in the Northeastern region of China and treated as a taboo with a great deal of superstition. The number is avoided whenever possible, if a buyer in a market is bargaining, he would offer 249 or 251 yuan for an item, but never 250 for risk of appearing foolish.
Every student in that friggin class is er bai wu.
er bai wu by Edward Rice May 2, 2008
Noun: A vagina, or a pussy(slang)
Adjective: An asshole, a prick.
Noun: Your chi bai is very smelly today.
Adjective: YOU ARE A FUCKING CHI BAI YOU CHI BAI.
chi bai by Wassup April 18, 2003
'in due time.'
with origins dating back to the 1940's, 'bum-bai' is the one pidgin word that really has no obvious derivative.
"Ho brah. No mess with me bum-bai i slap my dick on top your forehead"
~daven
bum-bai by Dr. Ren_Ayanami, Ph.D January 27, 2005
Saying bye to a boy usaully a prick or dickhead

"No he's not for me , boi bai"
When a boy isn't right for you or your not interested
"He stands no chance what so ever boi bai"
boi bai by Anna xoxo December 14, 2016
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or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
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korean word for madam, older woman
Ajumma wait a moment
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