sissy

Sissy (derived from sister), often cissy, also sissy baby, sissy boy, sissy man, sissy pants, etc., is a pejorative term for a boy or man who does not demonstrate masculine traits, is effeminate and shows possible signs of fragility. Generally, sissy implies a lack of courage, strength, athleticism, coordination, testosterone, libido, and stoicism. A man might also be considered a sissy for being interested in stereotypically feminine hobbies or employment (e.g., being fond of fashion), displaying effeminate behavior, being unathletic or being homosexual.

Sissy is also the male counterpart of tomboy (a female with traits or interests of the opposite gender), but carries more strongly negative connotations. Research published in 2015 suggests that the terms are asymmetrical in their power to stigmatize: sissy is almost always pejorative and conveys greater severity, while tomboy rarely causes as much concern but also elicits pressure to conform to social expectations. In some communities, especially ones whose members are prominently part of the later generations of Millennial and Generation Z, highly effeminate males are referred to as "femboys" (feminine boy), a term which aims to provide a way to refer to effeminate males without negative connotations.