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Definition of fatso noun from the Oxford Advanced Learner's Dictionary

fatso

noun
 
/ˈfætsəʊ/
 
/ˈfætsəʊ/
(plural fatsoes)
(also fatty)
(informal, offensive)
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  1. an offensive word for a person who you think is fat
    Word Origin1940s: probably from the plural of fat (in the sense ‘fat person’) + -o.
See fatso in the Oxford Advanced American Dictionary
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trait
noun
 
 
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