Thank you a lot for the reply. Would you also please tell me when the second phrase is usually used? Would you also say that in answer to one who's asked for a direction?
Best!
In BrE, "That is/was wasted on me/him/you" is fairly common, yes.
As far as when it's used is concerned, there are various scenarios. Here are a couple of examples:
Have you been to the cinema lately?
Yes. I went to see Avatar in 3D last week.
Was it any good?
The plot was OK but I only have one eye so 3D films are totally wasted on me!
Did you enjoy the wedding last weekend?
Yes, it was great. I loved the food.
So did I, and the wine had been specially shipped in from a tiny village in Italy where they only make 100 bottles a year.
That was wasted on me - I don't drink wine!
I'm not sure I understand your other question. You want to say "It's wasted on me" in reply to someone asking you for directions in the street? Why would you do that?
Hi. Can you tell me how to get to the cathedral please?
No. It's wasted on me!
That definitely doesn't work. Please let me know if I have misunderstood what you wanted to say.