MAC


Meaning of MAC in English

■ noun informal, chiefly N. Amer. a form of address for a man whose name is unknown to the speaker.

Origin

C17 (orig. a form of address to a Scotsman): from ~- , a patronymic prefix in many Scots and Ir. surnames.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.