holier-than-thou
adjective
[ həʊlɪəðənˈðaʊ ]
• characterized by an attitude of moral superiority.
• "they had quite a critical, holier-than-thou approach"
Similar:
sanctimonious,
self-righteous,
complacent,
smug,
self-satisfied,
priggish,
pious,
pietistic,
Pharisaic,
unco guid,
goody-goody,
preachy,
religiose,
