A person who strongly believes in or practices clubbism, showing extreme loyalty to their club or group.
From 'club' plus the suffix '-ist' meaning a person who practices or believes in something. The '-ist' suffix comes from Latin and Greek and has been used for centuries to denote practitioners of ideologies or members of groups.
A clubbist is someone who wears their group membership like armor—historically, this has described everything from devoted country club members to political party loyalists who defend their side no matter what.
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