FATSO (1980)

Dominick DiNapoli is a man who loves food and is overweight as a result. After an obese cousin dies due to health problems, Dominick's sister Antoinette sets out to help him lose weight. Although he has a hard time trying to slim down, Dominick finds inspiration when he meets and falls for shop owner Lydia. Can he get up the courage to ask her out, or will he go back to the comfort of overeating?