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sissy

[sis-ee]Informal.
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noun, plural sis·sies.
  1. Disparaging and Offensive. an effeminate boy or man.
  2. a timid or cowardly person.
  3. a sister, especially a younger sister.
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adjective
  1. of, relating to, or characteristic of a sissy.
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Origin of sissy

An Americanism dating back to 1840–50; sis + -y2
Related formssis·sy·ish, adjectivesis·si·ness, sis·sy·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for sissy

sissy

cissy

noun plural -sies
  1. an effeminate, weak, or cowardly boy or man
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adjective
  1. effeminate, weak, or cowardlyAlso (informal or dialect): sissified, cissified
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sissy

n.

1846, "sister," extended form of sis (q.v.). Meaning "effeminate man" is recorded from 1887; the adjective in this sense is from 1891. Related: Sissiness. Sissy bar is recorded from 1969.

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Online Etymology Dictionary, © 2010 Douglas Harper