acronym for "Body Mass Index", an outdated and inaccurate method of determining someone's health based only on their weight compared to their height, without taking into account lifestyle, activity, muscle tone, or any other important factor.
The body mass index. The classical way of defining and breaking one's degree of obesity when comparing one's body weight to height. In other words, it is a politically correct way of saying to someone that your a tub or lard.
