ㄨㄤˋㄈㄨˋˋwàng’ēn‑fùyì

忘恩负义
  1. 報答別人自己恩惠反而對不起恩人 忘恩負義唾棄」。

to forget favors and violate justice (idiom)​; ingratitude to a friend, to kick a benefactor in the teeth
ingratitude
undankbar (Adj)​