noun which may take the genitive case particle 'no'
totally willing; fully motivated; raring to go
Expresses strong eagerness or motivation to do something. Often used in casual, enthusiastic contexts.
彼は新しいプロジェクトにやる気満々だ。
He is totally motivated for the new project.
やる気満々の新人が入ってきた。
A new employee who is raring to go has joined us.