Bigot

Bigot is a pejorative term for a person who is obstinately devoted to their opinions. Often engaging in a rude and intolerative manner when these are challenged.

In computing jargon, a bigot is a person who is religiously attached to some operating system, software or hardware product and often advocates it enthusiastically. A bigot will often refuse to find alternatives to these, even when technological advancements has been introduced since their release.

See also: zealot, partisan