( BrE also cissy ) / ˈsɪsi; NAmE / noun
( pl. -ies ) ( informal , disapproving ) a boy that other men or boys laugh at because they think he is weak or frightened, or only interested in the sort of things girls like
SYN wimp
► sissy adjective
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WORD ORIGIN
mid 19th cent. (in the sense sister ): from sis + -y .