Hai is the spelling for 'Hi' used by children under twenty years of age who are trying to appear more Japanese but unknowingly don't realize it already means 'yes' in Japanese.
Western kid: Hai! I like Naruto.

Japanese guy: そうですか?
by ayono October 19, 2012

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A FOBby way of saying "hi" or "hello"
hai myslf jagdeep. . . ! ! ! ! 1 1 wanna b frensz?????
by Ariaxxx November 15, 2010

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A secondary greeting, to be used after the first round of hellos, typically on a phone conversation. It is often used as a filler while the caller/callee are remembering who called who and why. Pronounced similarly to "Hi" but the 'i' sound short, over-pronounced and with rising intonation, almost sounding surprised. Perhaps the best comparison is with a martial arts "hai-ya", but with the 'i' sound shortened abruptly. In writing, it is always followed with an exclamation mark.
"Hello"
"Hello"
"Hai!"
by Cornishman123 March 11, 2010

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A cooler way to say hi or hello. Originates from an Asian culture.
You: Hai guys

Guys: Hey Brittany (she's so cool!!!)
by Zebra Girl December 20, 2009

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A boastful person who thinks highly of himself and loves to wear tight clothing. A hater of the anything related to San Francisco 49niner. A Touface.
Jorge: Dude I score with this hot chick last night!

Batman: You're such a Hai!
by HaiLovesCokk June 07, 2011

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3. The Hai (shark) was an advanced model of the Marder-class midget submarines created in Germany during World War II. Its prototype performed poorly during test runs and therefore no other boats were produced.

The Hai was thirty-six meters long and its length allowed for larger batteries, giving it the maximum speed of twenty knots under water. In addition, the Hai could remain under water for up to two hours.

4. Hai (Ukrainian: Гаї) is a village in Brodivskyi Raion of Lviv Oblast, Ukraine
hai check wikipedia...this site is not allowing full definitions so again check wikipedia
by xxxxcome yyyyynot April 18, 2008

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Hack
Hai actually translates to "Hack" in English
by realpenguin September 09, 2011

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