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1.
a spazztic, philosophical, sensual, ghettofab female persona.
one that is good for a kickass laugh or deep and timeless conversation, so long as the moment consists of quality worthwhile people; one who enjoys abosorbing the culture of others; One who is sometimes dangerously devoted to the people she cares about. Hurt with caution.
Only you can call me "dirty hooker" and make it sound like a compliment. That's so...Cosette.

You blow every girl out of the water.
by JJJLo December 27, 2007
 
2.
An incredibly awesome girl. If you ever meet one in your life its a good idea to start talking to her because she's the most fun you'll ever have. Gets all your nerdy references and is more than capable of whipping up her own. really smart and nice. Has the most beautiful eyes in the world, they're like liquid gold.
"Hey this new girl Cosette just showed up in my class"

"Really man, awesome! Try to get her number, she's probably awesome!"
by ahorsenamedjeff December 31, 2013
 
3.
A character in Victor Hugo's Les Misérables. Cosette is the illigitimate daughter of Fantine, who had to leave her in the care of the Thénardier family while she worked to support Cosette. Unknown to the illiterate Fantine, the sociopathically cruel Thénardier family abuse the little girl and make false claims about her health so that Fantine will send more money to them. The money is then used for their own expenses and to spoil their own daughters, Eponine and Azelma, while Cosette is treated as a virtual slave... until Fantine's death, when her former boss, Jean Valjean, comes to rescue Cosette, bribing the ruthless Thénardiers to let her go. From there, Jean Valjean and Cosette escape to Paris.

Nine years later, at age seventeen, Cosette is a beautiful, well-bred young woman and doted on by Papa Valjean. Trouble begins when she runs into Marius Pontmercy, a young nobleman and student, and they fall in love. Valjean, worried about his discovery by Javert and about his adoptive daughter's safety, tries to thwart the budding love affair until he realizes that she's no longer a little girl and he has to let her go; out of love for her, he saves a wounded Marius from the barricade. She and Marius eventually marry before Valjean dies, leaving his life story to her.
Cosette's character is much stronger in the book and the depth of her romance with Marius a major emotional focus while Eponine is a peripheral character, although no less sad and pitiful.

Cosette is the peripheral character in the musical, almost one-dimensional while Eponine's presence is much stronger and shares the pathos with Fantine.
by Lorelili July 27, 2011
 
4.
A french name . Originated from the play Cosette. Cosette's are beautiful and well spoken.
That girl was such a hoe.
But she thought she was a Cosette.
by coco87453 March 23, 2008
 
5.
White girl with a big bubble butt who loves to beat up boys because it makes her look like a bad ass, doesn't care about much but is totally up for anything that is crazy and fun and causes trouble. Needs to go desperately to MAA (Monster Addicts Anonymous) and thinks everyone is a douche. Acts like a tomboy but wears Hollister all the time.
Person: "You stole my Monster!"
Cosette: "I don't care"
Person: "Your such a Cosette"
Cosette: "Douche"
by kathy.2012 November 19, 2010
 
6.
Little girl with a big penis.
Damn i was looking for whores and all i found was a Cosette.
by Uksoerleeasns January 28, 2006