recrimination; mutual blame-shifting
Refers to a situation where people blame each other, often in a back-and-forth manner. Commonly used in the phrase なすり合いをする.
After the accident, the drivers started blaming each other.
The politicians' mutual recriminations are tiresome for the public.
Common kana-kanji mixed spelling; the kanji 合い indicates mutual action.
Kanji spelling is possible but less common; 擦り is normally read こすり or すり, so this form may be confusing.
Compound of なすり (from 擦る, 'to rub off, shift blame') + 合い (mutual action). The exact derivation of なすり is uncertain, but it is associated with the idea of rubbing off responsibility onto another.