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!
by Idont Havaname February 3, 2004
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We must destroy x10, We must destroy all internet ad
by Kung-fu Jesus July 29, 2004
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Hell yea! That was x10!!
by Mike April 1, 2003
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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"
by Ashley Giesler and Amber Kaup September 1, 2008
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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...
by shoppertopper December 4, 2009
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