The kind of guy who looks fat from a distance.
The you get up close and he is 10 cm taller and 10 cm wider across the shoulders than you are.
Do not fight a guy like this, they will floor you be sheer mass and strength.
Look at some Olympic weight lifters and Shot Putters. 110 kg, and only 5 of those are fat.
Abe: That fat bloke ain't no threat.
Bob: Yeah, thin again, he's an endomorph.
A real endomorph, buildt like a brick wall.