bite the hand that feeds you
US /baɪt ðə hænd ðæt fiːdz ju/
UK /baɪt ðə hænd ðæt fiːdz ju/
1.
恩を仇で返す, 恩知らずなことをする
to harm someone who is helping you or providing for you
:
•
He shouldn't bite the hand that feeds him by criticizing his boss publicly.
彼は上司を公に批判して、恩を仇で返すべきではない。
•
After all the help they gave him, it was shocking to see him bite the hand that feeds him.
彼らが彼に与えたすべての助けの後、彼が恩を仇で返すのを見るのは衝撃的だった。