know which side your bread is buttered on
US /noʊ wɪtʃ saɪd jʊər brɛd ɪz ˈbʌtərd ɑn/
UK /noʊ wɪtʃ saɪd jʊər brɛd ɪz ˈbʌtərd ɑn/
1.
to be aware of where your advantages or benefits come from and to act in a way that maintains them
:
•
He always helps his boss because he knows which side his bread is buttered on.
•
You need to know which side your bread is buttered on if you want to succeed in this company.