also: げい
noun
bad physician; incompetent doctor
A derogatory term for a doctor who lacks skill or ethics. Not a common modern word; more often encountered in historical or literary contexts.
あの下医にかかると、かえって病気が悪化する。
If you go to that bad doctor, your illness will actually get worse.
昔の小説には、よく下医が登場する。
In old novels, bad physicians often appear.
Compound of 下 (ka, 'low, inferior') and 医 (i, 'doctor, physician'). The reading げい is an irregular variant, possibly influenced by older or dialectal pronunciation.