godan verb (-mu), intransitive verb
to fight among family; to have an internecine feud
Literary and idiomatic; describes bitter conflict within a family or close-knit group, often with tragic overtones. The expression is relatively rare in everyday conversation.
相続争いで兄弟が骨肉相食むことになった。
The inheritance dispute led the brothers to fight bitterly among themselves.
骨肉相食む内紛で会社が傾いた。
The company was ruined by an internecine internal conflict.