/ Thesaurus / F Synonyms of fat person Find synonyms for: Noun1. fatso, fatty, fat person, roly-poly, butterball, large personusage: a rotund individualWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language