[ U ]used instead of a particular name to refer to someone or something, especially when the real name is not important or you have forgotten it某某人;某某东西
She always keeps me up to date with the latest gossip - you know, so-and-so from down the road is having a baby and so-and-so's just bought a car.她总会把最新的小道消息及时告诉我——你知道吗,路那头的某某人怀上了孩子,某某人刚买了汽车。
so-and-sonounUNPLEASANT PERSON
[ C ]a polite way of referring to an unpleasant person令人讨厌的人,令人不快的人
Mr Baker was such a so-and-so - he was always really mean!贝克先生真是个讨厌的家伙——他总是十分刻薄!