MIRED IN MUCK is a phrase that describes a situation in which someone is stuck in a difficult and unpleasant situation. The word SLIMY is used to describe something that is slippery, greasy, or SLIMY to the touch. This phrase is often used to describe a person who is stuck in a difficult and unpleasant situation, such as a financial or legal problem. It can also be used to describe a situation in which someone is stuck in a difficult and unpleasant physical environment, such as mud or muck.