The definition of a sissy is a timid person or an an insulting term for an effeminate boy or man.
A man who is scared of everything and whose friends all make fun of him for being so timid is an example of someone who is a sissy.
- an effeminate boy or man
- a timid person or coward
- Slang a homosexual: term of mild contempt
Origin of sissydiminutive of sis
Informal of or like a sissy
- A person regarded as timid or cowardly.
- Offensive A boy or man regarded as effeminate.
- Informal Sister.
Origin of sissyDiminutive of sis
- sis′si·ness sis′sy·ness