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
Cute way to say Hi.
Looks so cute compared to the regular, hi or hello.

Usually used for typing, but can also be said outloud. (H-i-ah)
Person1: Hey, What's up?
Person2: Hai. I'm good, what about you?
by MEOW?!?!?!?! November 21, 2011
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
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
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
that funky green plant all the kids are smoking nowadays
smokin' on haaaayyyy in the middle of the bar..... - crucial conflict
by King Nicky July 16, 2003
The retarded way of saying "Hey" in conversation. Mostly used over the internet because the person is a complete dumbass and can't spell "Hey", or they're just being sarcastic and making fun of those dumbasses.
Dumb Person: HAY GUYS!
Normal Person: Shut the fuck up.
by AuntieTATA August 24, 2005