X-rated

lewd, obscene (x is the most censorious rating in a system that rates movies based on sexual content and violence)

He needs to stop using X-rated words in public.

X-rated by Light Joker August 29, 2005

X-pac heat 

Genuine dislike for a person rather than the character he is portraying.

No one wants X-pac Heat

X-pac heat by JJ Caez July 7, 2006

x more sleeps 

The number of days until an event. If you're a cretin.

OMG only x more sleeps until I can see Coldplay

x more sleeps by grumpy_quim July 29, 2012

x_x 

The face you make when you die

"Hi welcome to mcdonald's x_x*

x_x by daddyrogertaylor6939 July 29, 2019

x to the D

A more intense version of the simple "xD" smiley.

Crush: You're cute.
You: x to the D!

x to the D by maxhank August 11, 2009

X-Philes 

Plural of X-Phile: fans of the series The X-Files.

Most of my friends are X-Philes.

X-Philes by poisonjack March 24, 2008

X-Boy 

Guys who are only looking out for themselves and not "For The Boys". Will go out of their way to rattle buddy's and inconvenience them.

Chris drove to the bar without me, such an X-Boy move.

X-Boy by hobgoblin15 April 20, 2011