Liquid mud is a combination of water and soil that has a thick, viscous consistency. It is often found in areas with high levels of moisture, such as swamps and wetlands. The term 'liquid mud' can also be used to describe a type of slushy, muddy mixture. Two words that can be used to describe liquid mud are 'SLUSH' and 'SLOP'. SLUSH is a wet, soft mixture of snow and ice, while SLOP is a thin, watery mixture of mud and other materials.