[xiōng féi dì shòu]   

兄    肥    弟    瘦    旧喻兄弟相爱，临难争死。

旧喻兄弟相爱，临难争死。

Surrendering oneself to the cannibal bandits to substitute for his younger brother they captured, stating that he himself is fatter

兄友弟恭    兄死弟及    兄弟阋墙    兄肥弟瘦    兄弟怡怡