踌躇满志
To one's heart's content.
To be self-satisfied.
Puffed up with pride.
Look like the cat that ate ( swallowed ) the canary.

eg：With your academic achievement , you may play to your heart's content during the vacation.

中英俚语俗语来源：庄子：“为之踌躇满志。”

同义词：心满意足 After one's own heart.
反义词：挨批受罚 Get it in the neck.