/ fɪlθ; NAmE / noun [ U ]
1.
any very dirty and unpleasant substance :
The floor was covered in grease and filth.
2.
words, magazines, etc. that are connected with sex and that are considered very rude and offensive :
How can you read such filth?
3.
the filth [ U ] ( BrE , slang ) an offensive word for the police
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WORD ORIGIN
Old English fӯlth rotting matter, rottenness , also corruption, obscenity , of Germanic origin; related to Dutch vuilte , also to foul .