›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-assuranceBoastingsmart-mouthed
/ˌsmɑːtˈmaʊðd//ˌsmɑːrt-/adjective›a smart-mouthed little bratRude and cheekyRelating to sex and sexual desire