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Synonyms

fatty

1 American  
[fat-ee] / ˈfæt i /

adjective

  • fattier,
    comparative
  • fattiest
    superlative
  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.
  • fatties
    plural
  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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. informal a fat person

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Adjectives

Etymology

Origin of fatty1

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

Origin of fatty2

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Sometimes known as "Doctor Death", he became famous for developing a technique called plastination, by which fluids and fatty tissue in corpses are replaced by rubber and polymers.

From BBC Jul. 27, 2026

All the same, the fatty acid profile of tallow does overlap with some lipids found in human skin and sebum, including palmitic, stearic and oleic acids.

From Los Angeles Times Jul. 27, 2026

He told me that because animals like cows and bison share a similar fatty acid profile with humans, tallow-based creams are uniquely compatible with our skin.

From Los Angeles Times Jul. 27, 2026

This breakdown can contribute to serious conditions, including diabetes and fatty liver disease.

From Science Daily Jul. 26, 2026

Here and there one edge of the ruptured skin rose over the other, revealing its fatty layers, and little obtrusions like miniature bunches of red grapes forced up from the fissure.

From "Atonement" by Ian McEwan

I’d probably be considered a bad fatty and so would a lot of other fatties I know.

From Time Jan. 5, 2015

And I know it's a morality tale like Shockheaded Peter, but those children were bullies and pyromaniacs, not shy fatties.

From The Guardian Jun. 26, 2013

Pigeons don’t migrate, though, and despite their seasonal weight gain, birds tend not to be among the world’s top fatties.

From Slate Apr. 18, 2012

“No. They’re sports stars, actors, artists. The men with stringy hair are musicians, I think. The really ugly ones are politicians, and someone told me the fatties are mostly comedians.”

From "Uglies" by Scott Westerfeld

Say, all the fifty-seven varieties was represented,—tall ones, short ones, thin ones,219 plump ones, and plain fatties.

From Torchy by Brehm, George

It could be that processing the ground pork patties, which involved grinding the meat and adding the fattier meat to the lean, affected the kinetics of digestion.

From Science Daily Oct. 15, 2025

“Oils are added to products to help create a creamier, fattier flavor profile,” she says.

From Seattle Times May 2, 2024

They often import lean beef from countries such as Australia and New Zealand to blend with fattier U.S. supplies to make hamburgers.

From Reuters Nov. 10, 2023

Spareribs are fattier, with very little meat on the top of their long, flat bones, and plenty of well-marbled meat in-between them.

From Washington Post Jul. 8, 2022

"I wonder if you have anything to do with an old friend of my fattier, Archdeacon Bakkus?"

From The Mountebank by Locke, William John

The brain is the body's fattiest organ, with fatty compounds called lipids making up 60% of its weight.

From Science Daily Feb. 5, 2024

Many people nowadays shy from eating pork, especially the fattiest parts, but it serves as the base and the literal meat and bones of Hoppin’ John.

From Washington Post Dec. 23, 2022

Cold water produces the biggest, fattiest varieties of zooplankton.

From Washington Times Jan. 15, 2020

A lumbering, chunky beast clad in a sheep-like coat of hair, it is the hairiest and fattiest of pigs.

From The Guardian Dec. 27, 2019

Forage fish feed on zooplankton, and cold water produces the biggest, fattiest versions, said Shannon Atkinson, a physiologist and researcher at the University of Alaska Fairbanks.

From Seattle Times Feb. 10, 2017

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