不识好歹
bùshí-háodǎiTraditional 不識好歹
unable to tell good from bad; ungrateful
Every meaning
bùshí-hǎodǎi
- unable to tell good from bad; ungrateful
Its characters
Words with 不
Words with 识
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.