People who are extremely enthusiastic or passionate about something, sometimes to an excessive or unreasonable degree.
From Latin 'fanaticus' meaning mad or frenzied, from 'fanum' (temple). Originally applied to people possessed by religious fervor in temples, it expanded to describe any extreme enthusiasm.
The word literally means 'temple-possessed' because ancient Romans believed intense religious emotion was caused by divine possession—it's wild that we still use a word rooted in that ancient belief when describing obsessed sports fans.
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