Is smug knowing looks a pejorative epithet?

Yes, "smug knowing looks" can be considered a pejorative epithet, as it implies a sense of superiority or self-satisfaction in one's knowledge or understanding, often at the expense of others. The phrase suggests an arrogance or condescension that can be off-putting, indicating that the person believes they possess insight that others lack. In this context, it carries negative connotations, reflecting disdain for the attitude it describes.