Remember, the 'customer' is always right. [=never argue with a customer]
He is one tough/tricky 'customer'. [=he is a tough/tricky person]
The company has good/poor 'customer' service.
(..) Of course, of course. I have pins and needles that I'm sitting on. Pinkie promise? Oh, yes. My pinkie promises. All right. Our first customer is a man named Vector. But he's a V. You know, we're supposed to start with the A's. Then we go to the B's. Then we... (..)2010 Despicable Me