X to the Z 

Used to describe a mondo best friend.

What up my X to the Z dog?=How are you my best friend?

X to the Z by Fangsta March 19, 2003

x-fart 

when a well known ecommerce system screws up and throws a wobbly

"god damn it my shop's x-farted again"

x-fart by blobby October 1, 2003

"X" marks the spot 

a sex position when two chairs are put facing eachother and the male sits down on one and the woman sits on the adjacent chair and move closer to eachother till penetration is reached.

I broke the chair my grandma made for me when i was little, becuase me and my girl were doin the "X" marks the spot all day while my mom was baking.

"X" marks the spot by poopi pants December 28, 2007

X-Phile 

n. someone who likes to have sex with previous lovers

Bre, Steve is such an X-Phile, he fucks everybody but his wife.

X-Phile by Don Juan November 8, 2003

x-boned 

When two cars collide head-on with a car in between and perpendicular to them, forming an "X" shape.

"I boned my girlfriend, then got x-boned pulling out... of her driveway."

x-boned by lemminginstinct April 16, 2010

x-heesy 

When something totally rocks!

Thats off the x-heesy!

x-heesy by superchick765 February 2, 2004

X-Treme Tap Dancing 

Verb, to tap dance so crazily that you can't see you feet.

Crap that guy can X-Treme Tap Dance

X-Treme Tap Dancing by a pseudonym June 15, 2004