3N-UNCOUNT 無用的東西;質量低劣的東西 If you refer to something as muck, you are emphasizing that you think it is of very bad quality. 無用的東西;質量低劣的東西 [informal, disapproval]
He hasn't eaten anything for days. And are you surprised, when this muck is all I have to give him?.
他已有好幾天沒吃東西了,可我只能給他這種垃圾一樣的東西,你奇怪嗎?
The script is utterly banal. It is incredible that human minds can put such muck on to paper.