fanboy
noun/ˈfænbɔɪ/
/ˈfænbɔɪ/
(informal)- a person, especially a boy or young man, who admires a particular person very much, or admires and enjoys something such as a type of music, product, or film very much
- a Nintendo fanboy
- On social media the fanboys and fangirls leapt to his defence.
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fanboy