We don't have synonyms for Nancy boy yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are nancy boys and danny boy.
(n) :
(Commonwealth, UK, Ireland) Alternative spelling of nancyboy. [(slang, derogatory, Commonwealth, Ireland, UK) Synonym of nancy: an effeminate man, especially an effeminate homosexual.]
(n) :
(Commonwealth, UK, Ireland) Alternative spelling of nancyboy. [(slang, derogatory, Commonwealth, Ireland, UK) Synonym of nancy: an effeminate man, especially an effeminate homosexual.]