Filth is a disgusting amount of dirt.
muck
Thousands of tons of filth and sewage pour into the Ganges every day.
每天都有成千上万吨的污物和污水排入恒河。
People refer to words or pictures, usually ones relating to sex, as filth when they think they are very disgusting and rude.
The dialogue was all filth and innuendo.
这段对话全是下流的言辞和影射。