mr x

mister X is a person that you talk about with friends in code, usually a dealer of things that are code-worthy. See Mr. Nice Guy.

Are you going to mr x's? To get that stuff? Cool.

X core

x Core means, an emo, who is Clean and by that i mean :
no cutting
no smoking
no drugs
no alcohol
ect... you get the idea

I'm So X core...I shit razor blades and piss blood?

x for a line

Usually on snapchat, usually female. She'll give you a kiss and sexual favours for a line of coke

X for a line...

X-Wing

When you put your dick into a girls ass, then into her friends mouth, then into the second girls ass and back into the first girls mouth, forming an X pattern.

Yo Dude, I totally did an X-wing with Mary and her sister the other night, it was awesome!

X-Bi

The plural of x-box

Friend "Dude I bought 3 x-bi so i could play 3 times as much call of duty as i normally do"
Guy "You are so retarded"

x()o

The reciprocal of "xio" (kisses boners and hugs) i.e. kisses pussy and hugs.

See you soon sweetheart - xio
I can hardly wait - x()o

Class X

'Class X' refers to the graduating class of 2010.

The 'X', representative of the roman numeral is not only a badass symbol, but a popular motion made with one's arms.

The origin of the X is unknown, however it's addition to the greatness of the SEN10R class will be forever remembered.

500 seniors at the homecoming pep rally chant "CLASS X!" with X arms.

Junior: "I hate holding up one finger on each hand like i'm looking to pick my nose. I wish I had a motion as cool as that of Class X.