Synonyms

filthy

American

[fil-thee] / ˈfɪl θi /

adjective

filthier, filthiest

foul with, characterized by, or having the nature of filth; disgustingly or completely dirty.
vulgar; obscene.

filthy language.
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.
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

to make filthy; foul.

idioms

filthy rich, outrageously wealthy; very rich.

filthy British

/ ˈfɪlθɪ /

adjective

characterized by or full of filth; very dirty or obscene
offensive or vicious

that was a filthy trick to play
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

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

Related Words

See dirty.

Other Word Forms

filthily adverb
filthiness noun

Etymology

Origin of filthy

First recorded in 1350–1400; Middle English; filth, -y ¹

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.

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

Fruit makes up more than half of the filthy bunch, according to a report released Tuesday by the nonprofit.

From Salon • Mar. 26, 2026

Norway still exports plenty of oil and gas to the rest of Europe, while China’s electric age has been backed by filthy coal.

From Slate • Mar. 12, 2026

This was the dream scenario: baseball’s very best, edgy crowd, one-run game, two outs, a title on the line—and Ohtani getting the better of his pal on a filthy 3-2 sweeper.

From The Wall Street Journal • Mar. 5, 2026

The filthy sweater pulled from the underbrush had been the one she’d laid over Clare all those years ago.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023