I love when I'm filling out paperwork and get to put the category down. I know my coworkers reserve 'heavy' for people with BMI 35-40, and 'obese' for >45, probably. I, on the other hand, do a little guesstimating, and always put heavy for >25 and obese for >30. I just wish I had a way to show the fats so they would be pissed off.