An xover is a cross between two stories, usually a fanfiction, so that characters from different stories can be shipped as a pairing. (That's really only the general idea though)
Frozen and Rise of the Guardians were made an xover by the young fanfiction author so that she could write a Jelsa fanfiction.
by Red Band Society November 30, 2014
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An extreme hangover which is the result of drinking way too much freakin' booze and having "just one more shot!" of Patron XO.
Damn, I have a wicked ass Patron XOver. What the fuck did I do lastnite?

I wish Kelly didn't talk me into those last 5 shots; I wouldn't have this fuckin' Patron XOver. I need 3 advil and a gallon of water.... and please close the shades the sun is blinding.
by Michele one fuckin L January 14, 2010
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