サイコ
サ
イ
コ
Meanings
1
psycho; psychopath; crazy person
Casual term for someone who is mentally unstable, dangerously irrational, or extremely eccentric. Often used loosely as slang.
That guy suddenly got angry—he's a real psycho.
The psycho killer in the horror movie was scary.
Usage patterns
- 〈人〉はサイコだsomeone is a psycho / totally crazy
That guy is seriously a psycho.
- サイコな〈人〉a psycho/crazy person (attributive use)
A psycho killer appears in the movie.