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sicko

American  
[sik-oh] / ˈsɪk oʊ /

noun

Slang.
sickos plural
  1. sickie.


sicko British  
/ ˈsɪkəʊ /

noun

  1. a person who is mentally disturbed or perverted

"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

adjective

  1. perverted or in bad taste

    sicko prurience

"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

Usage

What does sicko mean? Sicko is a slang word for someone considered deranged, sadistic, perverted, disturbed, or the like.

Other Word Forms

Inflected Forms

noun

Etymology

Origin of sicko

sick 1 + -o

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s worth watching the whole thing, if you’re exactly the right kind of sicko.

From Salon • Apr. 26, 2026

Cycling through head coaches like Hollywood assistants who can’t perfect a Starbucks order is another symptom of college football’s sicko economy.

From The Wall Street Journal • Nov. 4, 2025

If you’re a sicko, buy the Orange Push-Up shake, which looks radioactive and tastes like being 7 years old.

From Slate • Sep. 5, 2023

This is a great episode though for fans of the sicko Tom-Greg dynamic.

From New York Times • May 14, 2023

“He’s been sicko all his life,” Mary Anne explained to Ben.

From "The Great Santini" by Pat Conroy

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