When someone takes things for granted. Or whines for no reason. Lack of appreciation or having an unjustified sense of entitlement.
15 year old girl: My parents said they won't buy me the new iPhone
2nd girl: Your rents pay for your cell phone?
15 year old girl: pffft duh ya
2nd girl: Bitch - you need a serious grattitude adjustment. Most of us have to buy and pay for our cell phones.