There are numerous synonyms for the phrase "gets fat," a commonly used term that refers to an increase in body weight that typically results from overeating or a sedentary lifestyle. Some alternative phrases include phrases such as "gains weight," "puts on pounds," and "packs on the pounds," which all serve to communicate the same meaning in a slightly different way. Other synonyms include "bulks up," "fills out," and "expands," while medical terms such as "obese" or "morbidly obese" are used to describe people who are significantly overweight. Ultimately, the choice of words used to describe weight gain may vary depending on context and personal preference, but they all communicate the same general idea.