<p><strong>Adjective:</strong></p><ul><li>Relating to, characterized by, or exhibiting psychosis: psychotic symptoms; a psychotic patient; psychotic symptoms; psychotic delusion.</li><li>Synonyms: non compos mentis, demented, deranged, disturbed, mad, mentally ill, psychopathic, insane.</li><li>Antonyms: lucid, rational, compos mentis, sane (loosely).</li><li>Intensely upset, anxious, or angry; crazy: My dad gets so psychotic when I come home even a little bit late.</li><li>Synonyms: pissed off, livid, incensed, irate, wrathful, furious, crazed.</li></ul><p><strong>Noun:</strong></p><ul><li>A person afflicted with psychosis.</li><li>Synonyms: maniac, madman, psychopath (loosely).</li><li>Someone who is mentally unstable: Her partner is a psychotic who often uses abusive language.</li><li>Synonyms: kook, nutjob, loon, loony, nut.</li><li>Someone who exhibits extreme emotion or behavior: My brother turns into a complete psychotic whenever his team loses.</li><li>Synonyms: psycho, maniac.</li></ul>