verb (used with object) Informal.
British Dictionary definitions for psych up (1 of 2)
British Dictionary definitions for psych up (2 of 2)
Word Origin for psych
Word Origin and History for psych up
as a noun, short for psychology in various senses (e.g. as an academic study, in student slang by 1895). As a verb, first attested 1917 as "to subject to psychoanalysis," short for psychoanalyze. From 1934 as "to outsmart" (also psych out); from 1963 as "to unnerve." However to psych (oneself) up is from 1972; to be psyched up is attested from 1968.
Idioms and Phrases with psych up
Excite emotionally, as in The chorus was really psyched up for performing in Symphony Hall. [Slang; c. 1970]