台Taivo A Taiwan Mandarin dictionary

吃裡扒外

chīlǐpáwài

ㄔㄌㄧˇ ㄆㄚˊ ㄨㄞˋ

Simplified 吃里扒外

1(idiom) to work against the interests of sb one derives support from; to double-cross one's employer; to bite the hand that feeds

Keep 吃裡扒外 and it comes back until you know it.