buy you a drink?
(Could I) buy you a drink?
1. Lit. Could I purchase a drink for you? (An offer by one person—usually in a bar—to buy a drink for another. Then the two will drink together. Also used with can or may in place of could.) When Sally and Mary met at the agreed time in the hotel bar, Sally said to Mary, "Could I buy you a drink?"
2. Fig. Could I make you a drink? (A slightly humorous way of offering to prepare and serve someone a drink, as in one's home. Also used with can or may in place of could.) Bill: Come in, Fred. Can I buy you a drink? I've got wine and beer. Fred: Great. A beer would be fine, thanks.
See also: buy