I have no problem describing myself at my higher weights as fat. Even now, I have my days where I feel fat. However, it's not "politically correct" or nice to use that word, I suppose. It's a dirty three letter word. Some alternatives that I have used or I have seen commonly used are -
heavy
chubby
overweight
plus size
obese
chunky
thick
Rubenesque
curvy
voluptuous
large
zaftig
plump
What are some words you use to describe being fat without actually using the word, "fat?" Is the word "fat" mean or politically incorrect?