fatty

1 of 2

adjective

fat·​ty ˈfa-tē 

fattier; fattiest

1

: containing fat especially in unusual amounts

fatty foods

also : unduly stout : corpulent

2

: greasy

3

: derived from or chemically related to fat

fattiness noun

fatty

2 of 2

noun

plural fatties

informal

: one that is fat

especially, disparaging + offensive : an overweight person

Synonyms of fatty

Adjective

• greasy
• adipose

Examples of fatty in a Sentence

Adjective

I try to avoid fatty foods.

fatty ground beef that was the cheapest available

Recent Examples on the Web

Adjective

That means, at minimum, heavy cream contains double the fat content of the fattiest half-and-half on the market. — Alana Al-Hatlani, Southern Living, 3 July 2026

Among the richest sources are fatty fish such as salmon, mackerel, herring, and tuna, as well as marine algae and seafood such as oysters. — Md Published, Verywell Health, 29 June 2026

Noun

And in mice fed a fatty, sugary diet, shutting the pathway down in the liver curbed weight gain, cleared out fat and improved insulin sensitivity. — Jacek Krywko, Scientific American, 5 Aug. 2026

For long-chain omega-3s, the American Heart Association recommends that people without coronary heart disease eat at least two servings of fish per week, especially fatty fish. — Lauren Manaker Ms, Health, 31 July 2026

Word History

First Known Use

Adjective

14th century, in the meaning defined at sense 1

Noun

1797, in the meaning defined above

Rhymes for fatty

• batty
• catty
• chatty
• natty
• pattie
• patty
• ratty
• tatty

Kids Definition

fatty

adjective

fat·​ty

ˈfat-ē

fattier; fattiest

1

: containing fat especially in unusual amounts

2

: greasy sense 2

fattiness noun

Medical Definition

fatty

adjective

fat·​ty ˈfat-ē 

fattier; fattiest

1

a

: unduly stout : corpulent

b

: marked by an abnormal deposit of fat

a fatty liver

fatty cirrhosis

2

: derived from or chemically related to fat

fattiness noun