adjective, filth·i·er, filth·i·est.
  1. foul with, characterized by, or having the nature of filth; disgustingly or completely dirty.
  2. vile; 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 by with): They're filthy with money.
verb (used with object), filth·ied, filth·y·ing.
  1. to make filthy; foul.
  1. filthy rich, outrageously wealthy; very rich.

Origin of filthy

Middle English word dating back to 1350–1400; see origin at filth, -y1
Related formsfilth·i·ly, adverbfilth·i·ness, noun

Synonym study

1. See dirty. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for filthiest

Contemporary Examples of filthiest

Historical Examples of filthiest

British Dictionary definitions for filthiest


adjective filthier or filthiest
  1. characterized by or full of filth; very dirty or obscene
  2. offensive or viciousthat was a filthy trick to play
  3. informal, mainly British extremely unpleasantfilthy weather
  1. extremely; disgustinglyfilthy rich
Derived Formsfilthily, adverbfilthiness, 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

Word Origin and History for filthiest



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