We don't have synonyms for best boy yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are best buy, rent boy and boot boy.
(n) :
(fandom slang) A reader or viewer's preferred male character.
(n) :
(film production) The first assistant to either the key grip (in charge of camera placement and movement) or the gaffer (in charge of lighting and electrics).
(n) :
(fandom slang) A reader or viewer's preferred male character.
(n) :
(film production) The first assistant to either the key grip (in charge of camera placement and movement) or the gaffer (in charge of lighting and electrics).