Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “smart mouth”

smart mouth

noun [C usually singular]   US informal
If someone has or is a smart mouth, they speak to other people in a way that shows little respect.Showing arrogance and conceitConfidence and self-assuranceBoasting smart-mouthed     /ˌsmɑːtˈmaʊðd/ US  /ˌsmɑːrt-/ adjective a smart-mouthed little bratRude and cheekyRelating to sex and sexual desire
(Definition of smart mouth noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of smart mouth

Translations of “smart mouth”

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More