Anyone who is loud, irrational, and rather obnoxious. Also typically shows an eagerness for tabletop roleplaying games but despite the amount of time played and possesion of material, never gets the rules down and stoops to constantly asking the others questions.

Also an example of someone who is obscenely fat. When such a person speaks, the noise either resembles that of an irate chiuaua or a noise akin to what Cthulhu would make.

Is the type of person that people frequently don't want to spend time with but do so anyways due to a lack of resolve.
What a cassie.

That person is such a cassie.

Nobody wants to hang out with a person that acts like a cassie would.
by No person in particular August 21, 2008
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Stalker, and a n00bser. shes mean cause shes friends with nick and shes mean to nice people. (idiots) shes going to hell.
Cassie stalked me through Iceland, it was pretty scary.
by M4ttst3r February 07, 2006
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A total back-stabbing bitch that pretends to be your friend then turns on you and talks behind your back.

A slut/whore/loose girl. A boyfriend stealer and user.

A liar. A bitch. Someone who has no future.
Girl 1: I can't believe it. She's totally turining on me! I thought we were friends.
Girl 2: I know. She's such a Cassie.
by A+H=4eva February 18, 2011
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A backstabbing, two-faced, slutty, bitch. She hits on every guy she meets girlfriend or not. She talks behind all her friend's backs, and pretend she loves everyone. No one loves her.
girl: OMG do you know Cassie?
Friend: YEA! she tried to hit on my bf yesterday!
girl: She's such a bitch!
by loveyatoocassie! March 18, 2011
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Someone who is annoyingly obsessed with school. She runs when she’s late to class and always gets mad when people don’t do their work. Cassie’s are usually very unpopular.
Omg you’re being such a Cassie, Why do you care so much?
by Mr roblox April 17, 2018
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That chick who hunts things... and eats pizza and wears a hat she loves left for dead two and her brother is stupid. shes my pimp
"man cassie walked in and she had black hair she was rockin her emo bow."
by Master Bowman February 19, 2010
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The hottest R&B singer to have ever walked the earth. Easily beats out Ciara, Rihanna, Beyonce, or any other R&B singer out there. She may be talentless as a singer, but most men are too busy focusing on her incredibly sexy bod, perfect face and lips, and tantalizing dance movements to criticise her musical ability.

Posed nude for Allure magazine, granting heaven on earth to horny 20somethings everywhere.
Guy 1: Oh my GOD I wish I could fuck Cassie
Guy 2: Who?
Guy 2: Help I've been shot!
by truestnigga June 17, 2008
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