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.
(..) But I need you to tell me that I'm not crazy. Oh, you're not. And I think you should talk to him. Larry Puckett's Chevrolet lets the customer do the talking. Larry Puckett's GM-certified vehicles are under factory warranty. And you can save up to percent off the original MSRP. (..)2003 Big Fish
(..) - Oh, that's great. - My attorney, Mr. Soggybottom. - Good to meet you. Pleased to meet you. What's the matter? I haven't seen a customer so depressed... ...since the elephant sat on that farmer's wife. "Depressed"? See? The big guy likes it. I just saw the woman I'm gonna marry. (..)2003 Big Fish