Japanese for "yes." Can also mean "okay" or used to answer a roll call.
Teacher: Smith!
Smith: Hai!
by Sita Snape May 3, 2003
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A basterdization of the greeting, "Hey". Commonly used by /b/tards on 4chan.
"Hay guyz, what's going on!?"
by Irne May 9, 2005
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Used of foreigners and tourists in Japan meaning anything and everything except no.
Cab driver: (In Japanese) So, where may I take you?
American: Hai!
by WeakAmphibiousWarrior September 22, 2006
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A term used to describe someone who doesn't follow through with plans, or bails on them.
"I was supposed to hang out with Willie today but he bailed again. What do you expect, he's hay."
by Donny Planet January 13, 2010
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Cantonese equivalent for English 'cunt'. Usually used with adjective 'chau'/'chow' (smelly). Pronounced with high note ending.

Also means 'Yes' in Cantonese if pronounced another way(!!!). The 'yes' pronunciation has a low note ending.

Not to be confused in pronunciation with Japanese 'Hai' (Yes/Affirmative). The Japanese pronunciation is short and abrupt.
Cunt - 'Diu nia ma chau hai' - Fuck your mother's smelly cunt.

Yes - Are you a foreigner who is mispronouncing 'yes' with 'cunt'? - "Hai"
by Durian March 26, 2004
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Verb. To emphatically agree to attend an event, only to not not attend, without any notification.
Are you going out with Sean or is he Haysing you again?
by larucifer July 7, 2010
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The intellegent, grammatically correct form of hru. stands for 'How Are You' used in internet conversations for literate people.
-Emma: Hey! Hay?

-Georgia: wtf is hay?

-Emma: Hay='How Are You?'

-Georgia: wtf...
by nerdlet4life April 21, 2010
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