Making a show of being morally better than others, especially hypocritically pious. (adjective)
Holy, devout. (adjective)
Examples of word sanctimonious
You refer to the sanctimonious speech by Obama in Cairo two years ago.
Such criticism, though a bit sanctimonious, is reasonably well grounded: in the years since an ailing Yeltsin appointed him Russia's president, on December 31, 1999, Putin has in numerous ways tried to reassert Kremlin control over the country.
The low point of self defeating activism came at a Radio City Music Hall fundraiser at which Chevy Chase said the president had the intellect of an "egg timer" John Mellencamp called Bush a "cheap thug" and Meryl Streep, in a performance that brings new meaning to the word sanctimonious, belittled the president's faith.
Lenz case so "sanctimonious" -- and dishonest -- as to suggest that he has never read the YouTube Terms of Service or discerned why a lawyer should not shriek that corporations "flout" their legal obligations by hiring third-parties who specialize in executing those legal obligations (p. 169-170).
Then, when it’s proven once again, we sit back in sanctimonious self-righteousness shocked, absolutely shocked, about humankind’s venality.