Holier-than-thou

[Rihanna]

When a person has taken the moral high-ground or are just up themselves, they are being Holier-than-thou. Holier-than-thou literally means, holier than me or better than me.

[Couch Potatoe]

acting like one is superior to others, condescending

[Becky]

Refers to someone that is stuck-up, or a snob. They must ALWAYS be the leader, and they are always a good leader. Ironically, they always have numerous faults, but never EVER admit to them.