one of the boys

1. 1.

   a man who has been socially accepted into a group of other men

   “he quickly became one of the boys”

   Broaderboy

Questions about one of the boys

What does one of the boys mean?

one of the boys means "a man who has been socially accepted into a group of other men".

Is one of the boys a common word?

one of the boys is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.