What is it when a person mumbles something bad about another person?

When a person mumbles something negative about another, it can be considered gossip or slander, depending on the context and intent. This behavior often reflects a lack of respect or an attempt to undermine the other person's reputation. Such comments may be made in a low voice to avoid being overheard, indicating a desire for secrecy or to avoid confrontation. Overall, it can contribute to a toxic atmosphere and damage relationships.