They sneer at us, then scarf up our junk food.

McDonald’s Corp. said May sales jumped as it sold more hamburgers and breakfast items in the U.K., France and Australia, sending the shares up the most since January in New York trading.

Sales at stores open more than 13 months increased 7.7 percent, led by a 9.6 percent increase in Europe and a 9.7 percent gain in Asia, the Middle East and Africa…