Longman Dictionary of Contemporary English homepage

Language: Old English
Origin: fylth, from ful; FOUL1

filth

noun
     
filth
1 [uncountable] very offensive language, stories, or pictures about sex:
I don't know how you can watch that filth!
2 [uncountable] dirt, especially a lot of it:
a mound of filth and rubbish
people living in filth
Passing cars covered his shoes with filth.
3

the filth

British English informal an offensive word for the police

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