I was thinking more along the lines of Cacomorphobia. I cannot classify or label myself because most phobias are "irrational fears". At any rate, BMI calculations are sometimes misleading. I knew a guy in high school who was 5'-10" 210 lbs and was solid muscle. His body fat percentage was quite low (14 - 16%), but under the BMI (30.1) he would have been a fatty. The body fat percentage factors in age, and waist size (some more advanced ones add the neck).