1) Fujioka Haruhi is one of the main characters of the anime series Ouran High School Host Club that is mistaken for a boy by the school's well... host club and is forced to join them because she broke an extremely expensive vase. She didn't mind that her gender was mistaken though, it's probably because her father is a transvestite.

2) Suzumiya Haruhi is the main character of the anime series The Melancholy of Suzumiya Haruhi. She is a beautiful, high school girl that is unusually weird and unpopular. That is because she will only accept friends that are espers, ghosts, and aliens. Haruhi also starts a club at her school called the S.O.S. Brigade that has 4 other members.
1) Stop being such a Haruhi Jenna! Unless you really do want girls to start crushing on you!

2) Geez Kevin, you're such a Haruhi sometimes. I'm sorry but I don't think that its very likely that you'll find an alien that will be you're friend.
by pocky_chan April 9, 2007
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1. n. & adj. Haruhi can be described as a state of being, in which you feel as if you're just one in a million. Although you may feel as if you are an individual/one of a kind, you are incorrect. Their maybe thousands of other people that have your personality, look like you, dress like you, have the same friends like you, have the same secrets as you, have the same dreams and wishes as you. Haruhi is a state in which you feel that you're alone in a world that is dull and boring and repetitive. This state can only be cured by overloading your life with extreme happiness and being random and eccentric so that hopefully you'll truly be "one of a kind". Amazing things happen all the time, you just have to find it.

2. n. & adj. Haruhi can also be used to describe yourself as being like haruhi from the anime: The Melancholy of Haruhi Suzumiya. Haruhi can be used to describe yourself in place of eccentric, outlandish etc. You know you're haruhi when you're having fun doing epic shit. You can be like haruhi when you attempt to look for ways to make you're life more fun and exciting. You can even use haruhi to describe yourself when something out of the ordinary happens.
1. "omgah dude, i'm totally fucking bored. life just seems so dull. I feel haruhi right now."

2. "that was the greatest night ever! i cant believe we saw that alien, esper, and time traveler all at the same time! my life is totally haruhi right now!"
by IntegratedDataSentientEntity October 11, 2010
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A mock religion, created to express worship of the anime character Haruhi Suzumiya, of Suzumiya Haruhi no Yuutsu fame.

In the series, it is revealed to main protagonist Kyon (a schoolmate of Haruhi's) that Haruhi is essentially God, but is as of yet unaware of her powers. She has the ability to change things in the world that she wishes were different; only her innate common sense, as well as Kyon's constant bickering with her, serve to keep her wild fantasies in check.

Followers of Haruhiism are called haruhiists. This term is used affecionately amongst fellow fans. The term haruhite is supposedly more derogatory, in the vein of Narutard.

Suzumiya Haruhi no Yuutsu/Yuuutsu (The Melancholy of Suzumiya Haruhi) is the first of a series of 9 light novels penned by Nagaru Tanigawa. It was adapted by Kyoto Animation into anime form. A second season of the show was announced this year on 7/7/07 (the Tanabata festival).

Lucky Star, another anime produced by KyoAni, frequently references Haruhi.
"Long live Haruhiism! The Goddess has returned for a second season!"

"Yeah, I've seen all the dubs and subs of the series, and of course learned the dance, too. I'm definitely a haruhiist for life now."

"I lol'd so hard when Konata gave her that Brigade Chief armband! PRICELESS!"
by Laughing Wolf August 31, 2007
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The belief that somewhere out there, in a 'normal' high school, God exists as a normal high schooler.

Based off the Melancholy of Haruhi Suzumiya where the character Haruhi is God living life in high school. She can alter reality and create dead space without even knowing it.

The Haruhi of the religion is often subjected to uncannily good luck, strange occurrences, and anything of the sort. They are subjected to superiority complexes although they are unknowing of their powers.
The world can alter to their beliefs.

Disciples are the ones in the know of the Haruhi's real powers and often keep reality stable by keeping the Haruhi steady.
The Haruhi usually attracts non-humans as her disciples.
For example, in Haruhiism if the Haruhi believes in ESPers and Time Travelers, then they will exist, although maybe not openly. If The Haruhi thinks that a cat can talk, then the cat WILL talk.

The Haruhi will usually have a buttmonkey whom they have taken a unusual liking to, for example, in the series it would be Kyon.
by Griim August 3, 2010
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To instantly friend zone or to be instantly friend zoned by a person.
Person 1: I like you.

Person 2: me too, your like my sibling!

Person 1: well that's haruhiism!
by Lady k8lyn April 20, 2016
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A character in the anime show "The Melancholy of Haruhi Suzumiya." She is an energetic person who has a sense that everything revolves around her. Coincidentally, she is the unquestioned controller of the universe. Although it is unknown to her, her mood can outbreak the destruction of the world.
If we lose the baseball game, Haruhi Suzumiya will make more closed space and destroy our universe.
by Steve Whalls June 15, 2007
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A moment at a time in place where you want something very much, and you don't get it, and suddenly someting catastrophic happens!
Brenda:"Wow, my mom wouldn't let me get a cellphone."

Jane:"So what happened"

Brenda:"Well, then the power went out for 34 days, and my house caught on fire!"

Jane:"Wow, what a Haruhi moment!"
by Yuki Nagato March 24, 2009
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