motormouth

noun

mo·​tor·​mouth ˈmō-tər-ˌmau̇th 

: a person who talks excessively

motormouthed

ˈmō-tər-ˌmau̇t͟hd 

-ˌmau̇tht

adjective

Synonyms of motormouth

• chatterer
• magpie
• chatterbox
• talker

Examples of motormouth in a Sentence

I had to listen to the motormouth's cell phone conversations for the entire commute.

Recent Examples on the Web

Like her spiritual kin Williams and Eleanor, Laila is somewhere in her mid-20s, a cheerful and judgmental motormouth, and a dab hand at merciless, quick-draw gunfights. — Sophie Brookover, Vulture, 5 Nov. 2026

Anthony Mackie plays John Doe, a motormouth scavenger eking out a living in the wastelands of the former United States. — Sara Netzley, Entertainment Weekly, 2 July 2026

But Fears’ motormouth is also his motor and Izzo is the last person to hem any of it in. — Dana O’Neil, CNN Money, 19 Mar. 2026

From his first moments onscreen in a performance of Duracell Bunny physicality and motormouth pushiness, Chalamet conveys the sense of a shameless young man willing himself toward greatness with a combination of chutzpah, amorality and unshakeable self-belief. — David Rooney, HollywoodReporter, 1 Dec. 2025

Word History

First Known Use

1955, in the meaning defined above

Rhymes for motormouth

• drouth
• mouth
• routh