psych someone up

psych (someone or oneself) up

To increase someone's or one's own excitement, confidence, or mental preparation. The coach psyched us all up just before we headed out onto the field. I was pretty nervous before the test, so I took a few minutes to psych myself up before I started.
See also: psych, up

psych someone up

tv. to get someone excited or mentally prepared for something. (see also psyched (up).) I psyched myself up to sing in front of all those people.
See also: psych, up