She is extremely bitchy when you're in an argument, she always thinks she is right, even when she isn't. Doesn't care about much, but herself, very hormonal, and into boys alot. Gets jealous sometimes, can get annoyed quickly if you say something bad about her. Very rude and always has to have it her way. Likes surprises. She's generally a really nice person, but you're in trouble if she doesn't like you/ you have got into an argument. Very loud and ongoing. Likes to be heard/ known. Not very mature for her age, doesn't see things in other people's shoes, hence her thinking she is right all the time. Doesn't like it when people explain it or repeat things, although she is very repetitive herself. Quite popular, and very pretty, although she doesn't see it.
Person 1: I'm so upset :'(

Person 2: Why?

Person 1: Because I'm in an argument with someone!

Person 2: Unlucky. Is it Marnie who you're in an argument with?

Person 1: Yeah.

Person 2: God help you!
by gsd123 November 19, 2011
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A Marnie is a very sweet girl who everyone loves but that’s not always true , Marnie can be rude and mean and talk behind your back. They will pretend they like you but nope. They are drama queens. On the bright side , a Marnie is amazing and really fun at times , chances are she will make your day but be careful cause u might run in to a bitch
See that girl , she well fly but acting a bit sly , she must be a Marnie
by Catkitka June 12, 2019
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To be soo drunk that you kill off a great party.

Marnie'd > Mortal > Drunk

The party ceases due to a certain someone.
"Brah she's absolutely marnie'd the night!"

"Mate I was so marnie'd on the weekend!"

"Did you see that girl who marnie'd the night?"
by Mount Olympus September 27, 2011
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The type of individual is strikingly alluring. Not just in her physical appearance but also in her demeanor and the way she handles things. Born for business, the average Marnie will be the most likely to win. Very competitive, which can be a downfall of a Marnie. Normally they are ride or die, down for the cause and not just because types.

Typically these types have a reputation for being true to themselves. Never needing to prove themselves to others, carrying their heads high a Marnie will be clutch when needed and caring when the situation calls for it. She finds it easy to direct the flow of people, steer the conversation where she wishes to take it and in any instant she will command the attention with strength and her loyal ways. You do not want to get into any altercation with a Marnie. A soldier at heart with tactical thinking and a very strategical mentality. May not be the best in school, but common sense is their playground. Dominating all the way home.
"Watch out for Marnie , you do not want to be on her bad side"

Friend #1 "DAMN, I wish I could get Marnie to f@#k me"
Friend #2 "Yeah right bro, she is loyal as a dog"

We need a win, we need a leader, we need a MARNIE
by I live for R&D August 3, 2021
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Marnie is all about the the true facts. If there is a fact that’s not true, you’re gonna hear about it. If there is a fiction that is even remotely true she will agree with it. Also dope shades and hair.
Me: Sorry I was incorrect about how to affix a branch on a fake tree

Marnie: it’s okay
by ShiroJoe June 22, 2021
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She look like syd the sloth , eats ass , and likes getting fucked behind dumpsters
Did you know marnie ate me ass yesterday?
by iwlatiodxo December 23, 2016
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The most amazing person you will ever meet. She's sexy, nice, sweet, beautiful, kind, caring, extremely talented, friendly, outgoing, awesome, cool, and all around the best person ever.
Marni is sooo amazing and awesome!
by AnonymousUser123 July 22, 2010
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