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/
"know which side your bread is buttered on" picture
1.

ekmeğinin hangi taraftan yağlandığını bilmek, çıkarını bilmek

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.
Patronuna her zaman yardım eder çünkü ekmeğinin hangi taraftan yağlandığını bilir.
You need to know which side your bread is buttered on if you want to succeed in this company.
Bu şirkette başarılı olmak istiyorsan ekmeğinin hangi taraftan yağlandığını bilmelisin.