family quarrel; strife among blood relatives
Idiomatic expression referring to a bitter conflict or dispute within a family, often over inheritance or power.
A family quarrel broke out over the inheritance.
Family strife is sometimes brought all the way to court.
The expression combines 骨肉 (flesh and blood; blood relatives) with 争い (conflict), literally meaning 'strife of flesh and blood'. The exact historical origin is uncertain, but it has been used idiomatically for family feuds.