I'm chomping at the bit.

Meaning

I'm very eager and impatient.

Examples

• John: Are you ready for vacation?
• Alice: Absolutely! <b>I'm chomping at the bit</b>! I can't wait to leave!
• John: Me too! Let's go!
• Alice: I know! This trip is long overdue. I'm so ready! <b>I'm chomping at the bit</b>!