noun
sicko
SIH-koh
noun
1
Slang: someone with disturbing or depraved tastes or habits.
"The tabloids called the vandal a "sicko" for what he did to the memorial."
How to Use Sicko
Learner’s notesIn plain EnglishAn insulting slang term for someone seen as depraved or mentally disturbed.
When to use it
Informal and derogatory — avoid in formal or clinical contexts.
Word Forms
more sicko comparative, sickos plural, sickoes plural, most sicko superlative
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “sicko”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
The tabloids called the vandal a "_____" for what he did to the memorial.
Etymology
From "sick" plus the informal suffix "-o", which forms slangy nouns for a type of person (compare "weirdo").