Idiom of the day :- All keyed up

Usage, examples and definition of the Idiom :-

Teddy has had a terrible day. It began when he overslept and was late getting to school. Then it rained and he got all wet coming home from school. Not only that he forgot to study for a history quiz! ‘Now you know why I returned home all keyed up,’ he explained. To be (all) keyed up is to be nervous, tense or excited. ‘That’s exactly how I feel,’ he nodded.