A smirk is a type of smile that often conveys a sense of smugness or self-satisfaction. When described as sardonic, it implies a mocking or cynical attitude. This expression can suggest that the person is amused by someone else's misfortune or is being sarcastic about a situation. Sardonic smirks are commonly seen in literature and film, often associated with characters who possess a sharp wit or a cynical worldview. This expression can create a sense of tension or humor, depending on the context, and is frequently used to highlight the complexities of human emotions and interactions.