"Reeenh! Reeenh! Reeenh! Reeenh!" (Or however you spell the creepy music from that infamous movie shower stabbing scene.) That's the sound that automatically jumps to mind for us when we hear the word "psycho." The word gets thrown around quite a bit to describe people - and not usually as a compliment.
The literal definition of "psycho," according to vocabulary.com, is "a slang term for someone who is mentally unstable or afflicted with a psychosis." In other words, your best friend risks looking like a psycho if she keeps stalking her ex-boyfriend months after their breakup. Among many other offerings, the Greeks gave us the word psykho, which means, simply, "mental."
So you get it, already. But if you've been called a psycho one - or many - times, you might wonder if you really ARE one. (Hey, if it makes you feel any better, a true psycho probably wouldn't care either way.) Anyhoo, here's a section of tests designed to answer the question, "Am I A Psycho?" Might as well find out the truth now! Good luck! (And please, don't kill us if you are one.)