noun
1 ( informal ) person who is enthusiastic about sth
ADJECTIVE
▪ baseball , cricket , football , sports , etc.
▪
He's a real football ~.
▪ fitness , keep-fit ( BrE )
▪ self-confessed ( esp. BrE )
▪
a self-confessed football ~
2 person with extreme views
ADJECTIVE
▪ religious
▪ right-wing
▪ crazed , murderous
FANATIC + VERB
▪ attack , kill , murder