腹背受敌（腹背受敵）　

◎ 腹背受敌 fùbèi-shòudí

[be attacked front and rear; be surrounded back and belly;be surrounded by the enemy at the front and rear] 前面后背受到敌人夹击

今则脊尾俱摇,腹背受敌,旧地皆失。——《挥麈三录》引王襄檄文