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Synonyms

filthy

American  
[fil-thee] / ˈfɪl θi /

adjective

  • filthier,
    comparative
  • filthiest
    superlative
  1. foul with, characterized by, or having the nature of filth; disgustingly or completely dirty.

  2. vulgar; obscene.

    filthy language.

  3. contemptibly offensive, vile, or objectionable.

    to treat one's friends in a filthy manner.

  4. (of money) abundantly supplied (often followed bywith ).

    They're filthy with money.

  5. 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)

filthied, filthying
  1. to make filthy; foul.

idioms

  1. filthy rich, outrageously wealthy; very rich.

filthy British  
/ ˈfɪlθɪ /

adjective

  1. characterized by or full of filth; very dirty or obscene

  2. offensive or vicious

    that was a filthy trick to play

  3. informal extremely unpleasant

    filthy weather

"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

adverb

  1. extremely; disgustingly

    filthy rich

"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

Synonym Usage

See dirty.

Other Word Forms

Derived Forms

Inflected Forms

Adjectives


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.

Keep Reading on Vocabulary.com

Vocabulary lists containing filthy

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:

Park advocates have long argued that the existing city allocation is inadequate, leaving neighborhoods with decaying recreation centers, deteriorating swimming pools and filthy park bathrooms.

From Los Angeles Times ● Oct. 1, 2026

One Berlin resident fed up with filthy streets has taken matters into her own hands.

From Barron's ● Sep. 15, 2026

No matter how filthy a tackle might be, Deschamps instructed his players to bounce back up and carry on in silence.

From The Wall Street Journal ● Jul. 9, 2026

Only a few days after the pool was refilled, though, it reverted what it always is: a filthy slime pit that nevertheless does an adequate job of its primary objective: reflecting.

From Slate ● Jun. 19, 2026

The hard plastic chair made Ann’s legs and back ache and was as filthy as the floor.

From "The Best of Enemies" by Osha Gray Davidson

"The state of 'neither war nor peace' is far filthier than war itself," 39-year-old Tehran resident Shahrzad told AFP.

From Barron's ● May 23, 2026

Yorgos Lanthimos earned a nomination five years ago for his last movie, the spiky period farce “The Favourite,” and his latest, “Poor Things,” is funnier, filthier and even more inventive.

From Los Angeles Times ● Dec. 4, 2023

That sponge, I reasoned, had to be way filthier than whatever Key Food filth had been lingering on the Coke I was about to bring to my lips.

From Salon ● Feb. 14, 2023

This means the toilets have become even filthier.

From The Guardian ● Dec. 4, 2017

The water was filthier than she could have imagined.

From "Zeitoun" by Dave Eggers

Yet Guadagnino can’t help but sand every coarse surface; even the filthiest walls here look carefully buffed to perfection.

From New York Times ● Nov. 29, 2024

In a school playground squeezed between two main roads, children play tag in some of Sheffield's filthiest air.

From BBC ● Dec. 4, 2023

We celebrated everything we could, bouncing from fancy restaurant to the filthiest dive bars we could find every week.

From Salon ● Jul. 9, 2023

Restaurant: Impossible Chef Robert Irvine heads to the Jalisco Cafe in San Diego where he tackles one of the filthiest kitchens of his career.

From Los Angeles Times ● Jan. 6, 2022

Down in the lowest, filthiest, and darkest corner of this foul hold sat Kambira, with little Obo crushed against his shins.

From Black Ivory by Francis B. Pearson

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