What can I do you for?

What can I do you for?

In what way may I be of assistance? What do you want or need me to do? (A colloquial, good-natured variant of "What can I do for you?") Haven't seen you in ages, Jim. What can I do you for? A: "I'm sorry to be bothering you so late." B: "Not at all. Now, what can I do you for?"
See also: can, what
Farlex Dictionary of Idioms.

What can I do you for?

interrog. How can I help you?; How can I serve you? Now it’s your turn. What can I do for you?
See also: can, what
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • it's too late for sorry
  • May I be excused?
  • Give me a rest!
  • in a sorry state
  • keep off (of) (one's) case
  • get off (one's) case
  • Get off case!
  • get off somebody's case
  • get off someone’s case
  • state