(1) A moist, sticky mixture, especially of mud and filth. (2) Highly decomposed organic material in which the original plant parts are not recognizable. Muck contains more mineral matter and is usually darker than Peat. (3) Earth, rocks, or clay excavated in mining.
MUCK
Meaning of MUCK in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012