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English definition of “sissy”

sissy

noun [C] uk   /ˈsɪs.i/ (also cissy) informal disapproving us  
a boy who other boys dislike and laugh at because they think he is weak or interested in activities girls usually like, or a person who is weak and cowardly (= not brave): Kevin is such a sissy. [as form of address] Can't you climb that tree, you big sissy?
sissy
adjective uk   us  
(Definition of sissy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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