おも存分 ぞんぶん
omōzombun

Adverb
Expression

1. to one's heart's content; to one's complete satisfaction; as much as one likes; heartily; thoroughly; without restraint; to the full

その独裁 どくさい しゃ おも存分 ぞんぶん特権 とっけん乱用 らんようした。
sono dokusaishawa omōzombun tokken'o ran'yō shita.
The dictator abused his privileges to his heart's content.
Other forms: