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

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

Advertisement For some fiber along with fatty fish, pair it with salad, other veggies, or whole-grain buns, Petersen suggests. — Matt Fuchs, Time, 26 June 2026

Noun

Everyone’s heartburn triggers are different, but common culprits include coffee, alcohol, chocolate, peppermint, citrus, garlic, carbonated drinks, and spicy and fatty foods, Toriz says. — Sarah Klein, Time, 30 June 2026

At Teruko at Hotel Chelsea in New York City, the guest-favorite cold appetizer is a fatty tuna tartare with mountain potato and served with crispy rice, with the option to add osetra caviar. — Aly Walansky, Forbes.com, 29 June 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