blabbermouthnoun [ C ]
uk/ˈblæb.ə.maʊθ/us/ˈblæb.ɚ.maʊθ/informal disapprovinga person who talks carelessly, often telling secrets to other people
Thesaurus: synonyms and related words
People who reveal secrets & tell tales
- big mouth
- dobber
- fink
- grass
- informer
- nark
- rat
- rumour-monger
- scandalmonger
- scaremonger
- sneak
- snitch
- source
- stool pigeon
- supergrass
- tattletale
- telltale
- whistle-blower