I've got a friend that stands 6'7" and tips the scale at 320 lbs. He has no fat on him, shaking his hand is like grabbing a bunch of bananas.
Anyway, they had some sort of scale in the mall that rated your health after you entered your weight and stood on it. I'm assuming it ran on BMI, it told him he was morbidly obese.
We called him fat bastard for the rest of the year.
On a side note, if he uses one hand on a pipe wrench, the wrench works just fine. But if something is really stuck and he decides to use two, the wrench snaps.
Brand new wrench too.