From Longman Dictionary of Contemporary Englishmannersmanners[plural] polite ways of behaving in social situations Her children all had such good manners. It’s bad manners to talk with your mouth full (=talk and eat at the same time). His manners were impeccable. Dad gave us a lecture about our table manners. You mind your manners, young man! ‘Lesley just got up and left.’ ‘Some people have no manners.’ Good heavens, child, where are your manners? → manner
Examples from the Corpus
mind your manners• Jack, mind your manners.mannersmanners[plural] formal the customs of a particular group of people a book about the life and manners of Victorian London → manner 