良心叫狗吃了

良心叫狗吃了

Literally means:

have one's conscience eaten by dogs

Actually means:

be ungrateful

良心, conscience, is one's judgment of what is right or wrong. This phrase means lack of conscience, usually used to describe doing evil things or things that harm others. Derogatory.

良心，指对是非善恶有正确的认识。指没有良心或丧失良心。多指做出坏事或危害别人的事。具有贬义色彩。