yǐ​dú​gōng​dú

combating evil

以毒攻毒 yǐ​dú​gōng​dú
combating evil verb
to combat a harmful person or situation by using the same methods or another evil force; to fight fire with fire
medical idiom
to use poisonous substances as a medical cure for diseases caused by toxins or similar ailments in Traditional Chinese Medicine

Frequency

Movie subtitles
0.360 per million appears in 0% of films
Written text
0.367 per million

Sources

Definitions
CC-CEDICT