13% 

13% is term referring population of African-Americans in United States.

It's used when blacks commit crime on Internet

"Despite being only 13% of population they commit 50% of all crime"

13% by Haage September 6, 2019

13 

finally considered a teenager and knows all the perverted jokes of the world

woah congrats duude your finally 13

13 by final13 March 18, 2009

13 

A number commonly known for superstitious beliefs about it being unlucky. Originally it was a holy number, but somewhere along the way it was hijacked and portrayed as unlucky. Fear of this number is called triskaidekaphobia.

13 by IkeM October 11, 2003

13 

Thirteen stands for M, the thirteenth letter of the alphabet. M is for Mexican Mafia. Any real Mexican gang that lives in S. California starding from Bakersfield and down all the way to San Diego should be affiliated with 13.

Mexican Gangster: Hey homie you bang!
Some fake gangster: No I dont please dont kill me!

13 by ASESSINO April 11, 2004

13 

The most annoying age for any teenager, when s/he is stuck in the awkward first year of being an adolescent.

When Sally turned 13, she felt like she was a different person.

13 by LizabethDae July 10, 2006

13 

used by sur13...or the surenos a gang originaly frum southern california...in spanish the thirteenth letter iz "m" and in gangland it standz for "mexican mafia" .thirteen iz used in many latino gangs...ms13..s13...m13..ect.comonly worn on gang clothing or jerseys ect..writen old english style.

that muthafucka iz frum cali..he wuz in Sur 13.

13 by latin assassin klick 187 July 9, 2003

13 

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.

See Hunter S Thompson's Hell's Angels, where this is mentioned.

13 by andyrew May 10, 2005