騙だまし合あい

noun

mutual deception; cheating each other

Refers to a situation where two or more parties are trying to deceive one another, often in a competitive or adversarial context.

• 政せい治じ家かたちの騙だまし合あいにはうんざりだ。

  I'm fed up with the mutual deception among politicians.

• あの二人ふたりはいつも騙だまし合あいをしている。

  Those two are always trying to cheat each other.