What body type classification is characterized by being short and fat?

The classification of body types that is characterized by being short and fat is known as the endomorph. Endomorphs typically have a higher percentage of body fat, a wider waist, and a rounder physique. This body type often struggles with weight management due to a slower metabolism but can excel in strength-related activities due to their build.

In contrast, ectomorphs are typically lean, long-limbed, and find it difficult to gain weight. Mesomorphs are muscular and athletic, having a more balanced body composition that allows them to easily gain or lose weight. The term "athletic" doesn't correspond to a distinct body type classification in the same way as the others listed; rather, it often describes the physical condition of an individual who may fit into the mesomorph category.

Therefore, endomorph is the correct term for describing a body type marked by greater fat accumulation and a shorter stature.