fight fire with fire

US /faɪt ˈfaɪər wɪð ˈfaɪər/
UK /faɪt ˈfaɪər wɪð ˈfaɪər/
"fight fire with fire" picture
1.

以牙還牙, 以毒攻毒

to use the same methods as your opponent, even if they are unpleasant, in order to achieve a victory

:
When they started spreading rumors, we decided to fight fire with fire and expose their lies.
當他們開始散佈謠言時,我們決定以牙還牙,揭露他們的謊言。
Some argue that to deal with cyberattacks, you sometimes have to fight fire with fire.
有人認為,要應對網路攻擊,有時你必須以牙還牙