Male masturbation. (Masturbate + Fuck). Semen produced by mucking is called muck milk.
by Creepeon_Films May 5, 2019
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in poker, to fold your hand

The muck pile is the pile of discards. Once your cards are in the muck, it's all over, baby.
"When that guy raised, I figured he had the nuts so I had to muck."
by Joe Bone March 11, 2005
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Similar to that of mung. Muck however, is the putrid projectile coming out of a deceased mans member (penis) after a violent stomp to his lower abdomen.
The name formally originated when two teenage girls attempted to “Mung” a deceased woman. However the name on the tombstone was androgynous such as the name “Pat.” To their surprise they were about to “Mung” a man. While one of the teenagers stomped on the lower abdomen, the other teen’s mouth was on the ripe decaying penis. She then gargled out the substance and uttered the word “Muck.”

Girl 1: "Howd that taste"

Girl 2: while gargleing the substance "MUCK!"
by Whatureppdunn July 9, 2009
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1. the act of covering other people with 'gunge' on the BBC's Dick and Dom In Da Bungalow.

2. semen

3. the act of covering other people with semen.
Dom: "It's really satisyfying extending my wand and spraying creamy muck muck all over the kiddies!"
by Ronny St Papps February 4, 2005
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May also be called Multi User Collective Kingdom or Multi User Construction Kit, depending on who you ask. The most common is Fuzzball MUCK, an open-source project. Two popular MUCKs are Tapestries and FurryMUCK. It is a text-based roleplay environment simmilar to a MUD but without the requirement to kill things and level.
Kevin has thirty-five alts on Tapestries MUCK.
by Spirit Bear October 28, 2004
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Slang for methamphetamines.
That fucking tweeker smoked up all my muck.
by Moji JoMama August 23, 2003
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