psycho
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
A person who is psychotic, psychopathic, or (broadly) otherwise insane.
Register: derogatory, slang
Where it’s used:
Used
American English
Examples
The loony bin up on the hill is full of psychos.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 2
Meaning · English
A person who acts in a bizarre or dangerous manner.
Register: derogatory, slang
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “psycho” mean?
A person who is psychotic, psychopathic, or (broadly) otherwise insane.
Is “psycho” formal or informal?
psycho is generally derogatory, slang.