filth

Concise Oxford English Dictionary © 2008 Oxford University Press:
filth/fɪlθ/

▶noun

• 1 disgusting dirt.

  ■ obscene and offensive language or printed material.

  ■ corrupt behaviour.

• 2 (as pl. n. the filth) Brit. informal, derogatory the police.

– origin OE fȳlth ‘rotting matter’, also ‘corruption, obscenity’, of Gmc origin; rel. to foul.