He pretends to be impartial, but believe me, he 'knows which side his bread is buttered on'.
I took the job because I needed to earn some 'bread'. [=(more commonly) 'dough']
Casual clothing has always been the company's 'bread and butter'.
(..) Mr. Sunday. -Yes. -And we'll be out of your way. -We're just hunting for quail. -Yes. -I'm sorry we don't have any bread. -No, no, no. Corn doesn't fill out in the hills here. It's mostly rock. We don't have room to raise the grain. Thank you, young lady. (..)2007 There Will Be Blood
(..) My family will help you set up your tent. No, please. We set ourselves on this camping trip. We have to do the camping. Hurry up! -Do you have bread? -We have potatoes. Potatoes would be nice, thank you. I'll have them boil you up some potatoes. That's all right. (..)2007 There Will Be Blood