Top Definition
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.
by jdawg124 December 11, 2011
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.