"A slap on the wrist" is a commonly used phrase that refers to a minor punishment or a warning that is meant to remind someone about their wrongdoing. There are several synonyms for this phrase, including a mild reprimand, a gentle admonition, a rebuke, a censure, a cautionary note, or a warning shot across the bow. These phrases signify a warning without severe consequences. They are meant to correct or guide a person's behavior gently and with compassion. Using one of these synonyms can help to make the language more precise and avoid overusing a common phrase.