Extremely excited, enthusiastic, or emotionally prepared for something you're about to do.
From 'psyche' (the mind or soul, from Greek 'psyche'), the slang verb 'psych' developed in the 1960s meaning to mentally prepare or excite oneself.
Athletes use 'psyching up' deliberately before competitions—it's not just mood; controlled excitement actually increases performance by boosting adrenaline and focus!
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