polite
/pə-ˈlīt/
adjective
of, relating to, or having the characteristics of advanced culture
marked by refined cultural interests and pursuits especially in arts and belles lettres
showing or characterized by correct social usage
noun
somewhat formal speech that is not offensive and can be used in all situations
idiom
in formal settings : with people you do not know well
It's not something you should talk about in polite company.