chīㄌㄧˇㄆㄚˊㄨㄞˋwài

  1. 自己人生活財物他人比喻己方內情暗中告訴別人敵人沒有胳臂道理不要吃裡爬外。」吃裡扒外」。

to work against the interests of sb one derives support from, to double-cross one's employer, to bite the hand that feeds you