What is what does pecksniffian mean?

Pecksniffian is an adjective used to describe someone who is hypocritical and insincere in their moral and benevolent attitudes or actions. The term originated from a character called Seth Pecksniff in Charles Dickens' novel "Martin Chuzzlewit". Pecksniff is depicted as a scheming and self-righteous character who pretends to be virtuous and caring but is actually a fraud. The term "Pecksniffian" is often used to describe people who act in a similar manner and whose actions do not match their words.