There is no absolute relationship between fat people considering being overweight and farting stinky or not.
Overweight is defined as weight more than 10% above the standard weight. It can be caused by heredity, bad habits, hypothyroidism, and other reasons. Most of them are asymptomatic, but symptoms such as exertion and difficulty in movement may occur.
When you take too much gas-producing food such as sweet potatoes and potatoes, you may experience farting odor due to the production of hydrogen sulfide, ammonia and other substances, and you may also experience farting odor when you have constipation or indigestion, etc., which causes the stool to stay in the intestines for too long and thus breeds bacteria. So not all overweight people have fart odor symptoms.
Farting odor in overweight people may also be caused by other reasons, you need to go to the hospital for further examination of abdominal ultrasound, CT and other items under the guidance of the doctor for treatment.