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

Humans are fattier and bulkier than the average rat, potentially further limiting how far these signals can travel, according to Hugh Lee. — Peter Hall, Scientific American, 29 Sep. 2026

Instead, opt for fattier cuts, like chicken thighs, pork shoulders, or beef chuck, that become tender and flavorful over time. — Anne Wolf, Martha Stewart, 6 Sep. 2026

Noun

Atherosclerosis occurs when fatty deposits, cholesterol and other substances build up inside arteries, according to experts. — Deirdre Bardolf, FOXNews.com, 3 Oct. 2026

Who actually needs digestive enzymes Signs of a genuine enzyme deficiency include diarrhea, stomach pain, bloating, unexplained weight loss and fatty or oily stool that floats. — Hanna Wickes, Kansas City Star, 23 Sep. 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