noun, plural sick·os. Slang.

Origin of sicko Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sicko

Contemporary Examples of sicko

British Dictionary definitions for sicko


noun plural sickos

a person who is mentally disturbed or perverted


perverted or in bad tastesicko prurience

Word Origin for sicko

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

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