Grudgers are those who hold resentment or ill-will towards others, often due to a past grievance. There are various synonyms that can be used to describe this type of person, including malcontents, begrudgers, and sourpusses. Others may refer to grudgers as being petty, vindictive, or vengeful, while some may simply call them complainers or whiners. Regardless of the term used, grudgers tend to dwell on past events and carry a negative attitude that can affect those around them. It is important to recognize and address these behaviors in order to prevent them from spreading and causing harm.