This is the "D'oh Face" emoticon. The capital X representing Homer Simpson's squinting eyes and the small "o" to represent the shape of his mouth as he exclaims, "D'oh!"

Alternately it can appear as: X0 or Xo!

It is meant to be distinct from XO, which represents kiss and hug—so be careful.
I spoke too soon when I declared that I was "King of the World." Xo
by malijn November 11, 2011
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Used is In the DMV mainly in VA means "Strong Grade of Marijuana"
Yoo Ima Hit The Block Uptown To Grab a $20 of XO
by 👆town August 29, 2013
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XO and cute and cuddly way of showing affection through and hug and a kiss.
Used to refer anything that is cute and cuddly in any nature.
That teddy bear is soooo XO
That cute boy Boon is sooooooooooo XO
by Matt March 2, 2005
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A popular belief among teens that people may love whoever they want no matter what gender they are. No one is labeled as gay, straight, bisexual, or any other sexuality. This results in a universal love felt around the world.

Most followers will post a picture on Facebook or other social networks of themselves with a black and red X over the left eye, light blue O over the right eye and a purple tongue coming out of their mouth. This is usually done by using the Microsoft Paint program.
XO Follower - "We are all humans, we are allowed to love anyone we want."
by JTeethO January 19, 2011
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Emote-icon. Guy with scrunched-up eyes in shock.
<Bloke1> I shagged your mum 8D
<Bloke2> Xo
by Dogbert May 6, 2003
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eXtra Old.

Strong alcohol drink - congac.
by grooves March 12, 2005
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