keyed up

adjective

Definition of keyed up

informal
: in a state of nervous excitement His hands were very sure. He was confident he could do the work, yet inside he was keyed up and jumpy.— Esther Forbes, Johnny Tremain, 1943 A friend called me, too keyed up to sleep.— Mike Nichols, Life and Other Ways, 1988

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First Known Use of keyed up

1880, in the meaning defined above

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The first known use of keyed up was in 1880

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