A fanxofficial is a type of pairing which involves an official character from a book, movie, show, video game or other area of fandom
, and a fan-made character.
Can be hetero or homosexual (yaoi
Sometimes refers to a more literal version of an actual fan and official pairing up.
Fanxofficial is either really, really loved or really, really hated, meaning either someone will become a good fan, or flame you silly (both has happened to myself).