Top Definition
1. A person or organization that buys goods or services from a store or other business, but is a total dick about it.

2. A person or thing of a specified kind that one has to deal with: "a tough customer"

3. An entity foolhardily demanding something that is clearly outside the boundaries of space and/or time.
The guy in Deb's section upgraded himself to cystomer when he changed his order twice and bitched about the time it took to get his food.

Christine had a rough day at the restaurant. She had a whole party of cystomers seated in her section.

As if being a teacher isn't a hard enough gig, four of the kids in Lisa's classroom have cystomers for parents.

Rich's new route has four cystomers on it. He's going to lose 45 minutes a day just dealing with their needy asses.
by @Damocles66 June 02, 2011
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