psych oneself or someone up Definition

psych
psyche
verb

psyched, psyching
1. colloq
To psychoanalyse someone.

Etymology: Early 20c: a shortening of psychoanalyse and other related words.

Phrasal Verb: psych someone out

To undermine the confidence of (an opponent, etc); to intimidate or demoralize them.

Phrasal Verb: psych oneself or someone up

To prepare or steel oneself, or them, for a challenge, etc.