- 1[usually singular] used to refer to a person, thing, etc. when you do not know their name or when you are talking in a general way What would you say to Mrs. So-and-so who has called to complain about a noisy neighbor?
- 2an annoying or unpleasant person. People sometimes say so-and-so to avoid using an offensive word He's an ungrateful so-and-so.
NAmE//ˈsoʊ ən ˌsoʊ//(pl. so-and-sos)(informal)