" Amped up "
Meaning:
Excited and ready for action.
Example:
He's been training for today all year. Now the big day has come and he's amped up and ready to go.
Where did it originate?:
USA, late 20th century. A reference to the amplification of acoustic instruments.
Where is it used?:
Worldwide, but more in the USA than elsewhere.
Hear the idiom spoken: