Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

fatso

play
noun fat·so \ˈfat-(ˌ)sō\

Definition of fatso

plural

fatsoes

often disparaging

  1. :  a fat person



Origin and Etymology of fatso

probably from Fats, nickname for a fat person + -o


First Known Use: 1944


Seen and Heard

What made you want to look up fatso? Please tell us where you read or heard it (including the quote, if possible).