a person motivated by irrational enthusiasm (as for a cause); "A fanatic is one who can't change his mind and won't change the subject"--Winston Churchill
marked by excessive enthusiasm for and intense devotion to a cause or idea; "rabid isolationist"
made to feel uncomfortable because of shame or wounded pride; "too embarrassed to say hello to his drunken father on the street"; "humiliated that his wife had to go out to work"; "felt mortified by the comparison with her sister"