Fattish

[Sarah]

Somewhat fat; inclined to fatness.Coleridge, a puffy, anxious, obstructed-looking, fattish old man.Carlyle.

[Vania]

Fattish is a term which defines somebody who is the most obese stage of [obesity]
Fattish is a word to instantly [annihilate] somebody who is at least somewhat fat .
Using this word against a fat person in an argument instantly makes you the winner of the [arguement]