Further to the definition referencing M for Marijuana, this originated from the Hell's Angels, who would have a 13 sown/drawn on their denim jackets if they smoked weed.
by andyrew May 10, 2005
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the most entertaining musical ever! music writen by genious, Jason Robert Brown.

About a 12 year old boy moveing to Indiana from New York. He has to deal with fitting in and makeing friends in time for "that one day in october," his Bar Mitzvah, "the event that defines you; the jewish super bowl."
Original Broadway Cast:
Graham Phillips, Allie Trimm, Aaron Simon Gross, Delaney Moro, Elizabeth Gillies, Eric Nelson, Ariana Grande, Eamon Foley, Caitlin Gann, Al Calderon, Brynn Williams, Joey LaVarco, Malik Hammond
<3
person 1-OMG did you see 13??
person 2-yeah! i loved it!
person 3-what's that?
people 1 and 2- GO SEE IT!!!
by lovergirly April 15, 2010
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SuR 13 Southern Mexicanos; a gang in Cali, and other places such as in ATL too
by L@_§Mµ®F¥¹³ March 21, 2004
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some cool person who is very awesome and chill and funny and definetly gets bitches
13 is so fucking cool
by erothicc March 28, 2022
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An age restriction often used on cringy gachalife porn videos, which is both cringe and misleading. But used because that is what the creator's age is.
Person1: Dude why tf is this shit only 13+ and not 18+
Person2: Probably because the creator is 13 lol
by Savagery Gaming June 20, 2021
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The age which means in Japan you can legally do the do, in America means you know all the dirty teen secrets, and in my mind means another 5 years of torture until you're free to buy a place to live, a car, delete your parents phone numbers, and actually have a life. Oh how much time there is to go. It is also considered an unlucky number for no good reason and is actually a quite nice number. I associate 13 with a sense of balance, as by turning the three once clockwise and putting it on the one, it creates a balance thing. That is all.
KidinJapan1: "Hey I just turned 13"
KidinJapan2: "so are you gonna bang someone or not?"
KidinJapan1: *long pause*

Kidinamerica1: I'm 13!
Kidinamerica2: so tell me what do you think about Mia Khalifa?
Kidinamerica1: *long pause*

Me: I'm 13. Another 5 years to go. Hooray, I survived 13 years so far in this cruel world!
by Periwinkle Ocean January 14, 2019
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A girl that once you bang, you're not sure if you bang again. Like blackjack. Once you get a 13, you're not sure if you would hit it again.
Billy- "That girl had an amazing body, but an ugly face. She's a 13."
John- "Are you going to hit it again?"
Billy- "Nah, probably not."
by BallZach January 6, 2013
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