Sanctimonious usually has a negative connotation, implying disapproval of such behavior. His sanctimonious remarks about charity work did not impress anyone.
Pro Tip 2/3
Not Truly Virtuous
Sanctimonious people pretend to be good or pious but may not act accordingly. She played the sanctimonious Samaritan, yet her actions were self-serving.
Pro Tip 3/3
Hypocrisy Indicator
When someone is sanctimonious, it often suggests that they are hypocritical. His sanctimonious talk on fairness seemed ironic, given his known deceitfulness.