Noun
(derogatory, slang) A young man whose physical attractiveness is considered rather effeminate and who may be vain about his appearance.
(slang, usually used by women) A good-looking young man.
Source: en.wiktionary.orgHoover proved effective at demythologizing folk heroes such as Charles "Pretty Boy" FloydGeorge "Baby Face" Nelson, as well as at professionalizing the bureau itself. Source: Internet