The act of cleaning out a building which has been damaged by prolonged flooding which has produced muck.
Once the waters have gone down, we can begin mucking out the buildings.
by JW Hawkeye June 14, 2008
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To enter ones contents of the bowels in to the bog. i.e. have a fucking good shit
I'll be gone sometime im off to the shitter for a muck out.

Dont go in their it stinks i've just had a fucking good muck out.

Wheres the bog, i need a muck out.

Your fucking cat has just had a muck out all over the fucking floor.

Look at that dog its having a nasty muck out, and it fucking stinks.
by Cunts November 3, 2006
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the transition between making out and fucking
Johnny Godeeper: "I made it to the muck out bro, but I didn't go all the way."
Melvin: "What's muck out?"
Johnny Godeeper: "It's like when you run from third to home...and the pitcher tags you out."
by esposed July 3, 2010
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Formed from 'mucking out' or cleaning the poo from livestock dwellings.

However, more modernly, it is in reference to laying the hammer down on a big babe's butthole. Hence, cleaning the poo from her balloon knot.
Me: Goddamn it, Bernice is lookin good over there.

Friend: you won't muck out her asshole.

Me: you think I'm scared to muck out Bernice? Fuck you pal. I bet I could muck her out so hard she loses 5 lbs... Then I do it
by TittyfaceJenkins July 1, 2021
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Mucking out the stables is a term in the UK relating to how stable boys remove horseshit from the horses living quarters. I think you get the picture? "I'd like to muck out his/her stables"
by tack November 19, 2003
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