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.
(..) Oh, sure, sure, sure. Please sit. Oh. What other words did you learn? Oh, just a minute. We have a customer. Bring out some tea, quickly. I'm watching my soap operas. Lazy bastard... Screw your soap opera... hurry up! The tea's hot. (..)2003 Kill Bill: Vol. 1