やるきまんまん
totally willing; fully motivated
No-adjective
彼かれはやる気満々きまんまんです。
He is driven.
あいつ、やる気満々きまんまんだね？
He's very motivated, isn't he?
彼かれは若わかくて未経験みけいけんだがやる気満々きまんまんだ。
He is young and inexperienced, but quite enterprising.