Arby's is an American fast-food institution, and the year it celebrated its golden anniversary, it coined the catchy slogan "We Have the Meats," but offered all of them in one legendary sandwich ...

This week, I reached out for the worst-kept secret in the drive-through, the Meat Mountain at America's roast-beef specialists, Arby's, with 3,400 restaurants from California to the New York Island.

So how do we explain Arby's Meat Mountain, a $10 sandwich and online sensation? Early online estimates had Meat Mountain weighing in at about 1,200 calories and 50 grams fat. Did we get through Meat ...