Sicko

//ˈsɪkoʊ// adj, noun, slang

adj, noun, slang ·Moderate ·High school level

Definitions

Noun
  1. 1
    A person with unpleasant tastes, views or habits. derogatory, slang

    "1986 June 9, David Denby, Movies: Poison, New York, page 130, But in fact, the murders have been committed by an army of sickos, a phalanx of wild-eyed droolers led by a monster goon with a concrete jaw and a Neanderthal brow."

  2. 2
    A mentally ill person. derogatory, slang

    "So come on, doc, precisely which kind of sicko is America? You might plump for depressed (isolationist), psychopathic (lack of empathy) or even psychotic (barking mad - what P.G. Wodehouse referred to as "thinking you're a poached egg")."

  3. 3
    A physically ill person.

    "The amazing Mr. Sick Day [Milo Filbum] has missed an amazing 73% of 1,020 work days for such ailments as a toothache, [...] "I finally gave the sicko his walking papers when other people started doing the same thing — calling in sick and all," the manager [said] ..."

Adjective
  1. 1
    Characterized by depraved tastes or habits; deviant.

    "“Your kid isn't nuts.” “Ever had one of his broccoli-and-asparagus omelets? Kid eats another vegetable, I'm going to ram a carrot down his throat until he gags.” “Most parents would kill for a kid like yours. Come on, admit it. This kid was sicko.”"

Example

More examples

"Some sicko chopper fucked up a lot of his friends."

Etymology

From sick + -o (“person with characteristic”).

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.