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!
ayon kay Dani ika-28 ng Oktubre, 2005
acting like one is superior to others, condescending
I hate that bastard's holier-than-thou attitude.
ayon kay Light Joker ika-19 ng Disyembre, 2006