My son just got accepted into mcdonald's university. Should I buy him a medal. ?

No.  Buy him a Burger King.

You're joking, right?  Google the definition of the word "university" and see if it applies in your son's case.   

Commend him for at least having <<some>> ambition and buy him a Big Mac.

tell him to major in mc-roeconomics and fix them ice cream machines 

no buy him a burger kings whopper .. lol  big deal mcdonalds university .. lol

Not until he graduates.  Then buy him a car.

Tell him to watch out for the cheeseburglar and don't get grimmaced by Mayor McCheese who just wants to load him up with debt in an evil plot to take over his life.  Call Officer Big Mac immediately and save the fry kids!!

No, but you should feel proud he doesn't want to stay at home living off you for the rest of his life.  Maccas may not be the most impressive of jobs but everyone has to start somewhere.  

You should be very proud of him. He has already gone further in life than his father has.

Are you referring to "Hamburger University"? That is the only one listed by your description, on line. Buy him a "happy meal".

No a Happy Meal and a Big Mac