What Does Fanboi Mean?
A fanboi is someone who is unusually attracted or devoted to a particular technology or tech company. The word is a slightly altered form of the idiomatic "fanboy," which is generally used for anyone who is a dedicated fan of anything.
Techopedia Explains Fanboi
Fanboi is Internet slang, where words are often misspelled for emphasis or for other reasons. Fanboi may be spelled this way in reference to an Avril Lavigne song, "Sk8er Boi," or because it often refers to fanatics of Apple's "i" devices, such as the iPod, iPhone and iPad.