Moom is the noon of the night. Midnight is to moom as midday is to noon. It can be used when "midnight" is just too many syllables to get through.
"Can't make it tonight bro, I won't be done with your mom until moom."
by _drone_ April 15, 2019
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1) 'Everything', It is used to confuse others. (n)

2) A rubber blue cow, which was beheaded. (n)
1) "What is Moom!" -- "It is everything *walks away*"

2) Moom has no head.
by ben February 8, 2004
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Stands for "Men's Opposite of Menstruation Syndrome"
A monthly cycle that men go through resulting in moodiness. The emotional male version of a period or PMSing without the physical aspects.
Watch out, Jim is on his MOOMS
by Bugmenot123123123 November 8, 2007
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to be slightly saddened when you hear or experience something that you do not like or that has otherwise make you feel unhappy in some way.
georgina: "how am i smelling today"

peter: "not so fresh"

georgina: "ow moom"
by Mezzaj January 24, 2012
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A mom that is a lot like a cow.
Hey Look colin, theres your Moom!
by SirSags April 17, 2003
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You know, if sometime tommorrow moom got into a car accident and died horribly while his children watched, I'd do nothing but laugh, because that'd be one less Hitler lover in the world.
by TallicaD00d October 12, 2004
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The act of being lazy. A "moomey-like" approach to life.
I'm really tired, I think I'm just going to moom out for awhile.

Where is Kyle? Oh hes just moomin out on his couch.
by Derelicte25 April 10, 2008
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