15
noun.

A '15' (pronounced 'quince' keen-seh) or a 'Quinceañera' is the milestone birthday party that Mexican girls and their families throw in honor of the big one-five. It symbolizes a girl becoming a woman.
And let's be honest, it's also an excuse to throw a huge ass party, because we Mexicans love throwing big parties.
I have a 15 tonight. I'm so excited to go!
by Demoman925 July 30, 2011

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Top Definition
15
One of the worst ages of being a teenager. You are in the middle and you wind up with the most problems that age. You are too young to drive without an adult, cannot go to the prom, and get a part time job like real teenagers. Your head is up your ass and one day you are still a kid watching cartoons and another day you'll like to have sex. This is also the age when most teen problems occur such as anorexia and cutting.
Bob: I am 15... what a crappy age. Only a few months until I turn 16, I can't wait.
by Lil Duff 2008 July 26, 2008

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15
As seen on How I Met Your Mother, used in reference to your cards in a game of blackjack, but about the bang-ability rating of a girl. In blackjack, a player says "hit" if he wants another card. Trying not to go over 21, 15 can be a bad hand, because the blackjack player isn't sure if he wants to hit or not.
"Man, did you see that girl that just walked by, she was fine"
"Ya, I guess. She was a 15"
"What?"
"'Cus I am not sure if I would hit that or not"
by Other Than That April 10, 2007

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15
Any girl under eighteen who lies about her age. Closley related to the term jailbait but more devious.
Jake went out with a total 15 last night he found out this morning when the cops showed up .
by Zeroklk December 07, 2004

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15
An age in a person's life when they aren't a kid, an adult or even a preteen but a teenager.
I'm only a teenager and I'm only 15!
by SakuraSaku June 28, 2007

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15
the REAL age to be considered a teenager, young person, young adult, etc
face it, teenagers have more responsibilities, go on dates, talk about sex, etc and obviously, 13 and 14 year olds are NOT that way. thats why 15 and up should be considered teenagers, despite the fact that most 14 year olds enter high school
by xxxmanoxxx February 09, 2008

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1.5
Pee is 1, and Poo is 2, so 1.5 is diarhhea. Not quite liquid, not quite solid, but everyone's favorite.
I have to go 1.5 really badly.
by florentina November 05, 2003

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