Word Study
fatso
WORDNET DICTIONARY
Noun fatso has 1 sense
- fatso(n = noun.person) butterball, fat person, fatty, roly-poly - a rotund individual; Array is a kind of large person
OXFORD DICTIONARY
fatso, n. (pl. -oes) sl. joc. or offens. a fat person.
Etymology
prob. f. FAT or the designation Fats
For further exploring for "fatso" in Webster Dictionary Online