忘恩负义

忘恩負義
wàng'ēnfùyì

to be devoid of gratefulness; to forget someone’s kindness and turn one’s back on him; to bite the hand that feeds one

Wiktionary

Homographs

忘恩负义 wàngēnfùyì
  1. to forget favors and violate justice (idiom); ingratitude to a friend
  2. to kick a benefactor in the teeth

Entry Composition

=1 忘恩 wàngēn to be ungrateful
=1 忘恩 wàng'ēn
  1. (formal) to forget favors; to be ungrateful
  2. to forget favors; to be ungrateful
2 负义 fùyì
  1. (literary) loyal (to one's friends); reliable; dependable
  2. (literary) to be disloyal
  3. loyal (to one's friends); reliable; dependable
  4. to be disloyal