When a person or animal is morbidly
obese (has a BMI of 40 or more and is at a greater
risk for illnesses including
diabetes, high blood pressure, sleep apnea, gastroesophageal reflux disease (GERD), gallstones, osteoarthritis, heart disease, and cancer) but somehow retains a hint of cuteness.
John:
Linda, your
cat is stupid
fat; she's struggling to breathe right now. It's kind of cute.
Linda: Yeah, she is morbidly tubby.