"Muck it up" is a common slang phrase that means to mess something up or make a situation worse. It is often used in a casual or lighthearted manner to acknowledge that mistakes or failures are a normal part of life.

No, muck fires can start anywhere there is muck. That's why they're called MUCK fires, not Florida fires.

Muck up day refers to the last day of school before students have annual exams and it is a day students play pranks and practical jokes. Putting a for sale sign in front of the school is one idea for a muck up day prank. The idea is to have fun and not cause damage. Pranks include honey on locker handles and hiding all the gym towels.

muck fires

The truck got stuck in the muck.