不知好歹
bùzhīhǎodǎi
ㄅㄨˋ ㄓ ㄏㄠˇ ㄉㄞˇ
- 1unable to differentiate good from bad (idiom)
- 2not to know what's good for one
- 3unable to recognize others' good intentions
Example
這個小孩不知好歹。
zhège xiǎohái bùzhīhǎodǎi
This child don't know what's coming for him.