The term for excessive body fat accumulation is obesity. It is characterized by an unhealthy amount of stored fat, often assessed using the Body Mass Index (BMI) as a rough indicator. Obesity can lead to serious health risks, including cardiovascular diseases, diabetes, and certain cancers. It typically stems from a combination of genetic, environmental, and lifestyle factors, including poor diet and inactivity. Addressing obesity involves adopting healthier eating habits, increasing physical activity, and, in some cases, seeking medical assistance for sustainable weight management.