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90s Slang You Should Know


[fil-thee] /ˈfɪl θi/
adjective, filthier, filthiest.
foul with, characterized by, or having the nature of filth; disgustingly or completely dirty.
vile; vulgar; obscene:
filthy language.
contemptibly offensive, vile, or objectionable:
to treat one's friends in a filthy manner.
(of money) abundantly supplied (often followed by with):
They're filthy with money.
verb (used with object), filthied, filthying.
to make filthy; foul.
filthy rich, outrageously wealthy; very rich.
Origin of filthy
Middle English word dating back to 1350-1400; See origin at filth, -y1
Related forms
filthily, adverb
filthiness, noun
Synonym Study
1. See dirty. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for filthy
Contemporary Examples
Historical Examples
  • I could bring one of them down; but the filthy creatures, ugh!

    The Wild Huntress Mayne Reid
  • These filthy people cook, eat and sleep all in this filthy hole.

    A Soldier in the Philippines Needom N. Freeman
  • The swarms of children were of the gutter, shoeless, tattered, and filthy.

    The Man with the Book John Matthias Weylland
  • Sooner than submit to your filthy embraces, I will dare exposure, and death itself!

    City Crimes Greenhorn
  • The Portuguese did not assume to be a cleanly race, and they were a filthy one in reality.

British Dictionary definitions for filthy


adjective filthier, filthiest
characterized by or full of filth; very dirty or obscene
offensive or vicious: that was a filthy trick to play
(informal, mainly Brit) extremely unpleasant: filthy weather
extremely; disgustingly: filthy rich
Derived Forms
filthily, adverb
filthiness, noun
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
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Word Origin and History for filthy

late 12c., fulthe, "corrupt, sinful," from filth + -y (2). Meaning "physically unclean" is from late 14c. Meaning "morally dirty, obscene" is from 1530s.

In early use often hardly more emphatic than the mod. dirty; it is now a violent expression of disgust, seldom employed in polite colloquial speech. [OED]
Related: Filthiness.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for filthy



  1. Wealthy; rich; loaded: He's filthy with dough (1930s+)
  2. Obscene; salacious; blue, dirty: filthy movies/ filthy minds (1535+)
  3. Excellent; desirable; cool, rad (1990s+ Teenagers)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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