“心服口服”，汉语成语，意为心里嘴上都信服，指真心信服，十分服气。可以翻译为“be sincerely/utterly convinced，admire from the heart”。

例句：

他输得心服口服。

He conceded defeat from the bottom of his heart.

由他当项目负责人，大家心服口服。

He is welcome to act as the project leader.