psycho
noun
- psychopathic or deranged person
Wiktionary
Pronunciation: /ˈsaɪ̯.kəʊ̯/ / /ˈsaɪ̯.koʊ̯/
adj
Etymology: Clipping of psychotic or psychopath + -o (“person with characteristic”). Compare sicko.
- Psychotic, psychopathic, or (broadly) otherwise insane.
“That psycho jawn had snuck a pistol into the gym while we was practicing and started shooting shit up like she was some kinda hot female action hero.”
“Oh, she's sweet but a psycho / A little bit psycho / At night she's screamin' / "I'm-ma-ma-ma out my mind"”
noun
Etymology: Clipping of psychology.
- A class, at a college or university, in which psychology is taught.
“I've got anthro, socio, lunch, and psycho.”