to know which side your bread is buttered on

to know which side your bread is buttered on
to know which side your bread is buttered
to know which side your bread is buttered on 明白自己的利益所在；知道该怎么保全自己的利益；善为个人利益谋算
See: butter

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to know which side your bread is buttered on
9. to know which side your bread is buttered or to know which side your bread is buttered on 知道自己的利益所在；善于为自己打算
- She'll apologize to you. She knows which side her bread is buttered. 她会向你道歉的。她知道怎样做对自己有利。
See: bread