X10 

A company that makes popup ads on Yahoo. Now they are bankrupt, possibly due to this song from Kompressor:

Economy failing is X10's fault
Popping up window is computer assault!
Window pop up again and again
Only solution is crush X10!!

We must destroy X10!
We must destroy all internet ads!

X10 by Idont Havaname February 2, 2004

x10 

An internet ad, see pop-up

We must destroy x10, We must destroy all internet ad

x10 by Kung-fu Jesus July 29, 2004

x10 

Awesome, cool

Hell yea! That was x10!!

x10 by Mike March 31, 2003

B X10 CW 

Pronunciation- (B X TEN C W)

Stands for Bestfriend times 10 cuddle wuddle.

Or

Best friends that are so close like Sisters or Brothers.

Made by: Ashley Giesler and Amber Kaup

" Omg shes my B X10 CW"

B X10 CW by Ashley Giesler and Amber Kaup October 19, 2008

Kutcher x10 

Pronounced Kutcher Times Ten

Describes a guy who thinks he is way cuter/hotter/sexier/more popular than everyone knows he is. They typically wear aviator shades or trucker hats or beanies or whatever the stupid ashton trends are in your area.

May also be substituted with "Segerblom x10"

Kristie: Hey. did you see the dude in the mirrored aviators?

Alee: Omigod, I know. He is sooo Kutcher x10...

Kutcher x10 by shoppertopper December 3, 2009

The Sirius-X10 Doomsday 

The Sirius-X10 Doomsday was a major event that took place in the Rex:Reincarnated community and more, it effected the entire layer of void and caused mass chaos for several minutes.

Hey dude remember the Sirius-X10 Doomsday?
Did you get nuked by the Sirius-X10 Doomsday?
Remember when Sirius-X10 nuked void layer causing the Sirius-X10 doomsday in void layer?

The Sirius-X10 Doomsday by BoctheClabberGasher June 22, 2025

X/10 

Commonly used on the internet to rate a trolling. Most of the time, X=0.

(Promptly after a Duckroll)
"10/10, op, you got me good."

or

"0/10 op, we all knew it was coming. fag."

The math:

X/10 = E(Q3) +2R /F
R= dubs, trips, quads, pents, hex, sects, octs. (If monos, R=0)
X= rating, E= trolling, F= faggotry of OP

X/10 by Anonymooseter June 4, 2011