noun / verb
muck
MUCK/mʌk/
Dirt or other unpleasant waste material.
Deep boot prints mark the thick muck beneath shallow muddy water.

Etymology
Old Norse myki, “cow dung,” is one possible Scandinavian source. The meaning broadened from dung and manure to dirty matter generally, then to wet, slimy messes.
In context
cuz you don't want him lying in muck and wet just to be comfy and warm really
More examples
- I scrape the muck off my boots before coming inside.
- We muck out the horse stalls every morning.
- One wrong measurement can muck up the whole project.
Forms
muck · mucks · mucked · mucking
mucky adjective — Covered with or consisting of muck.