Learn English – Word for someone who knows the rules

epithet-requestsword-usage

I would like to know a word to describe someone who is well-versed in the rules of a game, sport, activity, etc.?

Best Answer

I see that your question no longer mentions your nationality (US). I'm British and a commonly used journalistic word for an expert on sporting matters in the UK is pundit.

pundit : a person who knows a lot about a particular subject and who expresses ideas and opinions about that subject publicly (such as by speaking on television and radio shows)

Merriam-Webster

Other possibilities might be brain, egghead, genius, whiz, wizard, guru, master.

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