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sicko

[sik-oh]
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noun, plural sick·os. Slang.
  1. sickie(def 1).

Origin of sicko

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for sicko

sicko

noun plural sickos
  1. a person who is mentally disturbed or perverted
adjective
  1. perverted or in bad tastesicko prurience

Word Origin

C20: from sick 1 (sense 5) + -o
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 sicko

n.

1977, from sick (adj.) in the mental sense + ending as in weirdo. Sickie "a pervert" is attested from 1972, and cf. sicknik (1959) "pervert, obscene comedian" (applied to Lenny Bruce), with fad ending -nik.

Online Etymology Dictionary, © 2010 Douglas Harper