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

Only have fattier or leaner meat? —Josh Miller, Southern Living, 17 Apr. 2026

However, the difference is largely due to farming practices that produce fattier fish. —Md Published, Verywell Health, 15 Apr. 2026

Noun

Monkeys in the tourism hotspot have apparently learned to eat dirt to soothe stomach upsets caused by eating too much sweet, fatty and salty snacks fed to them by visitors, a new study found. —Adam Kovac, Scientific American, 22 Apr. 2026

The omega-3s from fatty fish like wild salmon play a key role in brain health and provide important nutrients like vitamin D, selenium, and zinc that support immune function and overall wellness, Gomes adds. —Randi Gollin, Martha Stewart, 22 Apr. 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