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

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

Slightly thicker slices can work well for fattier, more tender cuts. —Katie Rosenhouse, Southern Living, 6 Sep. 2025

Anti-inflammatory diets: Diets emphasizing colorful fruits, leafy vegetables, whole grains, and fatty fish like salmon may help reduce or control inflammation. —Jennifer Klump, Verywell Health, 3 Sep. 2025

Noun

The researchers analyzed samples of coronary plaques–fatty buildups on artery walls–from heart patients and found that about 40% of them had virulent bacteria in them. —Alex Knapp, Forbes.com, 29 Aug. 2025

This process is known as atherosclerosis – the build-up of fatty, inflamed plaques in arteries – and is a leading cause of heart attacks and strokes. —New Atlas, 26 Aug. 2025

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