Meaning

noun a prejudiced person who is intolerant of any opinions differing from his own

originFrom French bigot (“a sanctimonious person; a religious hypocrite”), from Middle French bigot, from Old French bigot, of disputed origin. It is most often believed to have derived from the identical Old French derogatory term bigot applied to the overly religious Normans, said to be known for frequently swearing Middle English bi God (“by God”) (compare Old English bī god, Middle High German bī…

Etymology from Wiktionary, CC BY-SA 3.0