PSYCH OUT

{v. phr.}, {slang}, {informal} 1. To find out the real motives of (someone). * /Sue sure has got Joe psyched out./ 2. To go berserk; to lose one's nerve. * /Joe says he doesn't ride his motorcycle on the highway anymore because he's psyched out./ * /Jim psyched out and robbed a liquor store, when he has all he needs and wants!/