Stoolie, also known as a snitch, informer, or rat, refers to a person who provides information to authorities or other parties about someone's wrongdoing. Other synonyms include whistleblower, nark, informant, betrayer, fink, and traitor. Each of these terms conveys a negative connotation and implies that the person in question is a liability to their community or group. Stoolie is often used in criminal contexts, where someone provides information to law enforcement in exchange for leniency or a reduced sentence. While the term stoolie may be seen as derogatory, the act of reporting illegal or harmful activities can be seen as a positive contribution to society.