fatty
1 Americannoun
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Disparaging and Offensive. a person who is overweight or obese (sometimes used as a term of address).
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a large marijuana cigarette, often shared and consumed by a group, with a shape and size similar to a cigar.
adjective
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containing, consisting of, or derived from fat
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having the properties of fat; greasy; oily
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(esp of tissues, organs, etc) characterized by the excessive accumulation of fat
noun
Other Word Forms
Derived Forms
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.
Researchers had previously found that gut microbes can modify bile acids and influence the amount of atherosclerosis, or fatty plaque buildup in the arteries, that develops over time.
From Science Daily • Jun. 9, 2026
The strongest protective effects were seen with omega-3 fatty acids, including those found in fish oil.
From Science Daily • Jun. 2, 2026
"These studies involved well-established experimental models that mimic insulin resistance in non-obese individuals. Trials in humans are needed to estimate the ideal dose and the most indicated type of omega-3 fatty acid," Curi said.
From Science Daily • May 31, 2026
Amy said: "It's not like a soft, fatty belly that can move. It's just in the way and heavy."
From BBC • May 30, 2026
Amy kept to her fatty suit until her legs were chafed and pimpled.
From "Me Talk Pretty One Day" by David Sedaris
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
