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slang Feeling jittery or mentally unprepared as a result as a result of being overwhelmed. I got so psyched out thinking about standing up and performing in front of all those people. Don't get psyched out by his mind games—just focus on what you came here to do.
1. mod. excited; overwhelmed; thrilled. She’s really psyched out.
2. mod. alcohol or drug intoxicated. (Drugs.) She’s just lying there, so psyched out.