[x9] 

It's a Brazilian slang to define someone who is a whistleblower. It stems from American comic books, initially published in newspaper strips in 1934.

bro, he gave you to the police, he's the biggest x9 i know

[x9] by big.mc August 28, 2019

X9

To be reported by the other nine players in a game of five-versus-five, for example in League of Legends. In order for an x9 to occur, a request has to be made in All chat.

Support (Janna): ashe toxic af and went afk, x9 pls

X9 by Bowsette_IRL June 21, 2016

X9

Brazilian slang for snitch.

Hey bro did you say that joão got X9'ed by paulo, and now he is on prison?

Yeah man let's get his ass! X9 dies early!

X9 by Aquele cara ali January 7, 2018

X9

Gang originating in the Northeast portion of the United States of America. Their colors are black and green. Can often be seen owning up.

Yo check it, X9 done owned up another store!

X9 by __-_ January 14, 2004

x9_note 

The Most Handsome Long Dick Russian. Known for his Huge Penis in the dead by daylight community, People harass him daily trying to just have a single peek of it. But X9 Note is VERY Loyal to his BF and DBD Teammate Haunt. Haunt is the only person that is known to have seen the Nock and Lived.

wow your penis is huge, its x9_note size

x9_note by BigBoyPickle October 8, 2023

(6 x 9)+(6+9) = 69 

is mathematical expression/equation sex that means two

general mathematical symbols or expressions, numbers, etc

√99: What (so)up guys, I was (6 x 9)+(6+9) = 69 with (34,5 x 4)
Plus Symbol (+):What is that??
3:Go to urban dicionary to see lol

(6 x 9)+(6+9) = 69 by Astronomicsmallchungustheorem May 26, 2021

9 x 9

It's what you have when you flip out.

My wife found out that I was drinking all night and she about had a fucking 9 x 9.

9 x 9 by Tomsterama March 3, 2008