fanboy - definition and synonyms

verb [intransitive/transitive] informal 

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present tense
present participlefanboying
past tensefanboyed
past participlefanboyed
  1. to be a very enthusiastic male fan of a band, actor, type of entertainment, product etc
    fanboy over:

    Don’t mind me, I am just fanboying over Meetan in the hot outfit.