Dictionary / Vocabulary / 医者の不養生
いしゃのふようじょう
failing to practice what one preaches
医者の不養生。
A good doctor follows his own directions.
あの先生タバコで肺がんになったんだって。医者の不養生、そのものだね。
For him a doctor to get lung cancer from smoking - it's a typical case of 'Do as I say not as I do.'