Blabbermouth

//ˈblæb.ə(ɹ)ˌmaʊθ// noun, slang

noun, slang ·Common ·High school level

Definitions

Noun
  1. 1
    A gossip. derogatory, informal

    "If it weren't for that blabbermouth Sally, the principal would never have known we did it."

  2. 2
    someone who gossips indiscreetly wordnet
  3. 3
    A person who talks excessively. derogatory, informal
  4. 4
    A kind of foam-dispensing nozzle used in firefighting at airports.

    "Two handlines are capable of 240 gpm and an undertruck "blabbermouth" nozzle can sweep the ground ahead at 240 gpm."

Synonyms

All synonyms
talebearertattletaletattletaletelltaleblabairbag

Example

More examples

""Nah, I wouldn't say anything to a guy like Tom." "That's right. Why would you say anything to a blabbermouth like him, of all people?""

Etymology

From blabber + mouth.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.