X Of Sound 

The application of semi-algebraic principals towards a sound pattern for electronic music. "X" being the time slot in the pattern where a sound sample could/should be used. If applied correctly, an equation of sound samples equates from the overall pattern itself, thus creating the most intense pattern of sound possible, for that point in a track. It's the natural sense of rhythm.

Many drum & bass/idm/breakbeat/breakcore musicians use the subconscious algorithms of X of Sound.

X Of Sound by DJ JDsssddee May 16, 2009

X-Must 

X-Must: Fictional Cola from the video game Headhunter

*** SPOILER ***

&It &turns &out &to &be &part &of &a &plot &to &infect &the &people &with &a &virus

"X-Must has 100% artificial ingredients!"

X-Must by TsuQ May 24, 2009

X-streets

cross street - a street intersecting a main street (usually at right angles) and continuing on both sides of it

Definition of X-streets

my friend Origin, lives on the corner of X and Y.
I like on Broadway and Alameda.

the major intersection nearest to a persons home.
i.e. "What are your cross-streets?"

X-streets by The -Z- October 23, 2009

X-Box 

Another title for an ex-girlfriend.

"I was thinking about toying around with my x-box, but I decided to find someone new."

X-Box by Seth2367 March 15, 2010

X-Box 

The vagina belonging to an ex-girlfriend, esp. during a booty call.

Where's Anthony tonight?

He went out on a booty call with Sheila, that chick he dumped last month, again.

Man, that guy plays so much X-Box it isn't funny.

X-Box by Xboxking April 18, 2010

X-Men 

Slang word for ecstasy

I dropped a couple of x-men before I came to this

X-Men by Dirty 🐻 June 22, 2019

X_X 

x.x , x-x , X-x , X_X , X.X and X-X
are just a died text emoji also it's usually used by gamers like :

Gamer 1 : oh no X_X
Gamer 2 : aw man you died ?
Gamer 1 : yup X_X

X_X by TrueRobloxGamer September 21, 2020