Person (male or female) who are under the impression that they are the ruler of the world... or at least the establishment they are getting service in. Basically a person who expects to get what he wants in a store, restaurant, etc., with no regard to policies or laws.
B: I had the shittiest customer this morning!
C: What happened?
B: She expected me to take her friend's credit card, and when I told her I legally couldn't do it, she bitched me out and called over my manager screaming that she'd never shop here again!
C: Sounds like a classic entitlement bitch to me.