psycho
word
Definition
A very informal and often offensive word for someone considered mentally unstable, violent, or extremely irrational. It is also used more loosely in casual speech for someone acting in a shocking, obsessive, or crazy way.
Usage & Nuances
Usually offensive, so avoid it in careful or respectful speech. In everyday conversation, people often use it hyperbolically ('My neighbor is a psycho'), but that can sound harsh; common patterns include 'a psycho', 'total psycho', and 'psycho ex'. It can refer either to someone dangerous or just someone acting wildly.
Example Sentences
Don't call her a psycho.
basic
My ex went full psycho when I said I was leaving.
natural
That driver was a total psycho.
natural
Relax, I'm not a psycho—I just like things organized.
natural
That man is a psycho.
basic
People think the killer was a psycho.
basic