filthy
Americanadjective
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foul with, characterized by, or having the nature of filth; disgustingly or completely dirty.
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filthy language.
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contemptibly offensive, vile, or objectionable.
to treat one's friends in a filthy manner.
-
(of money) abundantly supplied (often followed bywith ).
They're filthy with money.
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Slang. (especially in sports) formidable: knocked down by a filthy right hook.
a young rookie with a filthy curveball;
knocked down by a filthy right hook.
verb (used with object)
idioms
adjective
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characterized by or full of filth; very dirty or obscene
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offensive or vicious
that was a filthy trick to play
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informal extremely unpleasant
filthy weather
adverb
Synonym Usage
See dirty.
Other Word Forms
Derived Forms
Etymology
Origin of filthy
First recorded in 1350–1400; Middle English; see origin at filth, -y 1
Explanation
Filthy is a dirty word. Sure, you can say it aloud in public, but it means "dirty" — like your dirty laundry pile by the end of the week. The joy of filthy really lies in the limitless range of its usage. Just about anything can be filthy, not just your dirty socks. You can have filthy living conditions, or wear filthy clothes, but it's also used to refer to something morally or ethically odious, too: "filthy liar," "filthy language," and so on. It can also indicate envy or outrage on the part of the user, as in our favorite use of the word, "filthy rich." Now that's a use of filthy we'd be happy to put up with.
Vocabulary lists containing filthy
Unit 1: Telling Details
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Tax Day Words
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Vocabulary from history writings about the Triangle Factory Fire
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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.
She then was transferred to Pretrial Detention Centre Number 5 in Donetsk, where she shared a small, filthy cell with around 20 common-law prisoners.
From Barron's • May 8, 2026
PowerWash Simulator sees players don their cleaning gear and hose down a variety of filthy in-game locations until they're sparkling and spotless.
From BBC • Apr. 3, 2026
On the way to a fancy ball, his gallant attempt to guide his date past a fetid puddle ends with him splashing her “from head to foot with that filthy water.”
From The Wall Street Journal • Mar. 26, 2026
Fruit makes up more than half of the filthy bunch, according to a report released Tuesday by the nonprofit.
From Salon • Mar. 26, 2026
A filthy, ripped sofa piled with broken furniture and bags of garbage sits in the middle of the living area, a stained mattress propped up against its side.
From "Red Flags and Butterflies" by Sheryl Azzam
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.
