All keyed up is a phrase that expresses a state of high energy or excitement. There are many synonyms to describe this feeling, such as exhilarated, pumped up, excited, thrilled, thrilled to bits, and hyped-up. Other synonymous phrases include having butterflies in your stomach, being on cloud nine, being over the moon, being jazzed up, and being stoked. The phrase 'all jazzed up' depicts a high level of enthusiasm and a readiness to take on anything while the phrase 'over the moon' conveys tremendous emotional satisfaction. Ultimately, whether you're all keyed-up or hyped-up, these terms vividly depict a level of excitement that promises endless possibilities.