supergrassnoun [ C ]
uk/ˈsuː.pə.ɡrɑːs/us/ˈsuː.pɚ.ɡræs/UKa person, especially a criminal, who gives the police a lot of information about the activities of criminals, especially serious ones
Thesaurus: synonyms and related words
People who reveal secrets & tell tales
- big mouth
- blabbermouth
- dobber
- fink
- grass
- informer
- nark
- rat
- rumour-monger
- scandalmonger
- scaremonger
- sneak
- snitch
- source
- stool pigeon
- tattletale
- telltale
- whistle-blower