noun, verb, slang ·Moderate ·College level

Definitions

Noun

1. 1
   One who talks very quickly or incessantly; a chatty or loquacious person. informal

   "He's such a motormouth that I can never get a word in."

2. 2
   someone who talks incessantly wordnet

Verb

1. 1
   To talk very quickly or incessantly. informal, intransitive

Synonyms

All synonyms

airbagbabblemouthbabblerbag of windblabblabberer

Antonyms

All antonyms

quiet

Example

More examples

"He's such a motormouth that I can never get a word in."

Etymology

From motor + mouth, from the figurative notion that the mouth moves so much that it seems motorized.

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