psycho
UK: ˈsaɪ.kəʊ | US: ˈsaɪ.koʊ
n. Informal term for a psychotic or mentally unstable person.
adj. Relating to psychosis or irrational behavior.
The word "psycho" originates from the Greek psyche (ψυχή), meaning "mind" or "soul." It entered English via the prefix "psych-" in scientific terms like "psychology." By the early 20th century, "psycho" emerged as a colloquial abbreviation for "psychopath" or "psychotic," reflecting societal shorthand for mental instability. The suffix "-o" adds an informal, often derogatory tone, as seen in words like "weirdo."
The film’s villain is a dangerous psycho who terrorizes the neighborhood.
She dismissed his erratic behavior as just another psycho episode.
The term "psycho" is often misused in casual conversation.
He studied criminal profiles, focusing on psycho-social factors.
Don’t act like a psycho—calm down and think logically.