N. One who displays violent or anti-social behavior, often attributed to mental instability or personality defect.
Jim is known as Sergeant Death because he's a total psycho.
by Naughtius Maximus May 08, 2005
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a deranged and/or psychopathic person who is a mentally ill or unstable person. also see psychopath.
psycho: "whoo hoo hoo hoo! im a fucking, mentally ill psycho!"
me: "you fucking sound like Tigger!"
psycho: "that's T-I double Guh Er!"
by like, dude! May 29, 2003
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A person who don't cry when mufasa dies in the lion king
do not ever watch the lion king with a psycho. One of you will not survive the experience
by Sabronna February 15, 2016
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"oh no! the psycho is knocking at my door! I told him it's over but he ain't gonna leave me alone!"
by refresh button July 10, 2008
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