1.(noun) Another term for someone who is schizophrenic or just plain insane.

2.(adjective) Describes someone with the same meaning as above.

1. Short for "Schizophrenic" as in "Paranoid Schizophrenic". Which is a severe mental disorder often confused with "Mutiple Personality Sydrome".

2. Someone with wildly diverse personality traits that manifests themselves in a less than sane manner.

An abbreviation of either schizoid, schizotypal or schizophrenic. Or more likely, a general insult used to imply someone is 'crazy'.

There's a set of diagnostic criteria for these disorders (readily available on Wikipedia). Schizophrenia is the most severe (actually a psychosis) and can be either 'positive'(characterised by mainly auditory hallucinations) or 'negative' (social withdrawal etc..). Schizoid personalities do not experience psychotic periods and are just people that are happy to live in their own world and for the most part, shun social contact. Schizotypals fall somewhere in between: they are withdrawn and don't have the hallucinations of the schizophrenics but they can be prone to odd paranoias and beliefs (for example, the belief that people can read minds).

noun. A slang term for a person whose personality has schizophrenic features. Can be used as an abbreviated, but still unoffical, term for a true schizophrenic but more often is used pejoritavely about a person who displays erratic behavior. See also nut case

adj. Displaying schizophrenic or mentally deranged behavior. See also coo coo for cocoa puffs

n. A chronically insane person, short for schizophrenic.

someone who is always talking to themselves and acting crazy