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Phrase(s): get mad (at something)
to muster all one’s physical and mental resources in order to do something difficult. • Come on, Bill. If you’re going to lift your end of the piano, you’re going to have to get mad at it. • The sergeant keeps yelling, "Work, work! Push, push! Come on, you guys, get mad!"
McGrawhill's American Idioms And Phrasal Verbs