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1. A super sexy smart girl who is your bestie she can be atheletic and indepenednt she is fun loving and can be a crazy hooligan - nothing like mary-kate olsen
2. Some one who is like mk olsen, but there really is only one mary kate olsen
by samers101 January 28, 2009
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Mary Kate's are usually beautiful and completely selfless. They are lighthearted but determined, strong, and independent. Mary Kate's are very friendly but can be intimidating because they are so independent. Mary Kate's are usually worldly and wise beyond their years. They have old souls but know how to party and can fit into the different aspects of modern day life. Also, they are physically beautiful and super sexy!

They are very trustworthy and reliable. They put others first always sometimes to the point of forgetting about their own feelings. They have sacrificed a lot but are thankful for all they have. Usually brunettes.
Guy: Who's that brunette over there?
Girl: Oh, her? That's Mary Kate!
Guy: Wow, she's beautiful!
Girl: She only dates foreign men, sorry. And we're best friends so you can't have her.
Guy: You've never even talked to her before.
Girl: I know, but just look at her! She's so radiant, I feel like I know her!
by Roseandrise June 22, 2013
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An amazing girl. She's funny and smart, and all around an cool person. She isn't a bitch, but she will make sure that you understand her thoughts on a specific subject. She's athletic, artistic, and a great person to be-friend. I know I'll never want to lose the Mary Kate in my life.
Guy 1: Hey Mary Kate. What's up?

Mary Kate: Not much. I just finished my newest sketch, and now I'm headed to speech and debate.
by Aggressive_ace November 29, 2012
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Not at all like a hyphenated Olson twin! Amazing, beautiful, loving, resilient and optimistic. FEARLESS for the sake of fun. Will do most anything for the chance to make a memory of it! Loves passionately and for real. Great secret-keeper and best friend. Kinda wild but entierly loveable. Avoids people named Ashley.
Where were you last night?
Annapolis with Marykate.

Most likely to talk to a stranger?

"Yeah, she 'wet her pants' but she still made it to the party."

Emkay, you are the bestest!
by jennkissin'frogs February 02, 2010
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To vomit profusely or to make yourself vomit. A direct referance to Mary-Kate Olsen's eating disorder.
"That chinese food got the best of me. I might have to go mary-kate that shit up, here in a minute."
by Amy Christ April 29, 2005
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a Mary Kate is an energetic, artistic, fun - loving girl. She has a great smile, and a cute body. She's really into music, and has an extremely unique taste. She's a big-time party girl, and is unafraid to experiment... with ANYTHING. Her clothing choices are even more unique than her taste in music, but be careful. a Mary Kate can be a bit of a poser or attention whore at times, but everyone still loves her.
1: What is Mary Kate wearing?

2: Who knows, she probably just picked it out for attention.

1: I don't care, she looks GOOD!
by gthfk8774 December 28, 2011
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