Top Definition
Someone who is secure with being overweight. A fat person who is so confident with themselves, that they are impervious to any demeaning fat terms (fat jokes).
Person 1--- Look how fat that guy is , if I was that fat, I would never take my shirt off at the pool, what is wrong with him?

Person 2---- nothing, he just doesn’t give a shit about what others think, he’s a Fatmug.
by cashmills January 23, 2010

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.