Student or Learner
Hi.Plz I'm searching for an idiom or an expression that expresses this meaning:
someone who can do anything you asked him for and who knows many things. For example: if u wanna rent a car, he can tell you where to go. If you wanna buy anything, he can tell you its price and where to go to buy it. Is there any expression or idiom like that?
Not a teacher.
Mr. know-it-all is possible.