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.
Just because I made one stupid mistake doesnt mean Britney gets to give me this holier-than-thou attitude!
de Dani 28 Octombrie 2005
acting like one is superior to others, condescending
I hate that bastard's holier-than-thou attitude.
de Light Joker 19 Decembrie 2006