fatty

¹ American  

[fat-ee] / ˈfæt i /

adjective

fattier, fattiest

1. consisting of, containing, or resembling fat.

   fatty tissue.

2. Pathology. characterized by overproduction or excessive accumulation of fat.

---

fatty ² American  

[fat-ee] / ˈfæt i /

noun

Informal.

plural

fatties

1. Disparaging and Offensive. a person who is overweight or obese (sometimes used as a term of address).

2. a large marijuana cigarette, often shared and consumed by a group, with a shape and size similar to a cigar.

---

fatty British  

/ ˈfætɪ /

adjective

1. containing, consisting of, or derived from fat

2. having the properties of fat; greasy; oily

3. (esp of tissues, organs, etc) characterized by the excessive accumulation of fat

---

noun

1. informal a fat person

Other Word Forms

• fattily adverb
• fattiness noun

Etymology

Origin of fatty¹

Middle English word dating back to 1350–1400; fat, -y ¹

Origin of fatty²

First recorded in 1790–1800 fatty ² ( def. 1 ); 2003 fatty ² ( def. 2 ); fat, -y ²

Example Sentences

Subcutaneous injections deliver medication into the fatty tissue layer between the skin and muscle.

From Barron's • Apr. 6, 2026

The researchers discovered that levels of miR-93 are unusually high in both people with fatty liver disease and in animal models.

From Science Daily • Mar. 24, 2026

Scientists have uncovered a surprising risk linked to blocking a cellular enzyme once believed to protect against fatty liver disease.

From Science Daily • Mar. 23, 2026

In both grocery aisles and the public consciousness, items such as avocados and almonds were deemed too fatty to be “healthy,” while Cocoa Puffs and Pop-Tarts technically qualified.

From The Wall Street Journal • Mar. 19, 2026

The strong fatty cheese tastes just like the kind Prim makes, the apples are sweet and crunchy.

From "The Hunger Games" by Suzanne Collins

Related Words

• greasy
• oily