Let's take a trip through the the ages...
Ok, so big muck is ACTUALLY a modern stand-in for old-timey phrases; muck-a-muck, mucky muck, muckety muck, or lord muck, which, when used, make a buddy sound like an ol' piece a' coal. Each are synonymous with such other, old-timey-yet-choice phrases as, big enchialada, big kahuna, big daddy-o, big cheese or big banana.
"Who's the big muck around this 'ol heap, anyhow?"
"They got me good, Pa, 'appears I'm fixin' to meet the BIG MUCK, upstairs...(gasp)"
"I'm the big muck in my world, and I'll wear a leisure suit whenever and wherever I please, thank you very much..."
lipstick
derived from nadast language, that was made famous in anthony burgess', a clockwork orange
she had so much goober muck on, her lips were neon!
A female's smelly vagina. Typically a prostitute.
Paul thought that he hit a home run last night with Debbie, until she dropped her panties. Her muck twat left a pungent odor that lasted for weeks.
Mr. Rowe prefers a mouth full of muck twat every morning to start his day off.
Fox, don't think about following through on your dumpster date with Shelly, unless you are in the mood for a ripe muck twat.
Muck Apples means to eat a lot of apples (Anywhere from 4-11) very fast and messy.
Mason: "Ahmad you can't muck apples just give up that's only 2"
Ahmad: "No Mason I can muck a lot just watch"
The act of pilfering one's asshole while they are asleep or without permission. Also known as Rape.
I butt mucked the fuck outta that bitch last night.
An extreme state of disorderliness
The garden shed is a mucking fess
Muck bodies are anything that makes you feel queasy, especially in relation to the human body.
Muck bodies are anything that make you feel sick looking at them, especially in relation to serious injuries, like deep cuts etc.
"Arthur cut his arm really deeply. You could see tendons, veins, and all sorts of muckbodies in there."