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.
政治家たちの騙し合いにはうんざりだ。
I'm fed up with the mutual deception among politicians.
あの二人はいつも騙し合いをしている。
Those two are always trying to cheat each other.
Compound of 騙し (continuative form of 騙す, 'to deceive') + 合い (noun form of 合う, 'to do mutually').