1. the sound a cow makes when it is confused.
2. an expression used to express basic and abstract emotions such as confusion, frustration, depression, joy, boredom, etc.
3. an onomatopoeic expression used when one is beyond all response, either literally or emotionally.
4. a way to describe something that is unfavorable in some way, but not to the extent of being total crap; somewhat bland.
1. farmer: ok, this cow's going to the factory farm.
cow: mur? o__o
2. person 1: so wut did u think of the math test?
person 2: mur...
3. evil physics teacher: ok, so u have to find the wavelength after getting the frequency and speed by finding the spring constant and factoring in the mass of the object in kilograms then converting it so that u get a trajectory and looking for the derivative of time and space.
hapless student: ...mur?
4. man, that movie was so cheesy and... mur.
by ViktortheMur December 9, 2004
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Mur basically means many things:
1 No
2 Fuck that
3 Oh my god
4 Fuck off
5 I'm tired leave meh alone
6
" Do your coursework"
"Muurrrrrr"
by Chase November 25, 2003
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You know when you finish peeing and the last dribble makes a pee ring on your boxers where your pecker touches the cloth. That is a MurRing.
Greg Jones has the first ever observed case of the MurRing. And after pointing this out he says, "My MurRing is exposed!"
by Chris Jones Murrel September 17, 2008
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1. a word with the most vague definition - it can be defined as anything. circumstances under which this word is often used is when it is needed to replace another word that shouldn't be uttered, or has been temporarily forgotten. a synonym for the words "thing," "stuff," etc.

A: "Hey, let's smoke some mur."
B: "You go ahead, I'm already really fucking stoned."

1 1/2. marijuana

2. a word used to fill a silence...particularly helpful for the socially awkward, misunderstood and nonchalant person
A: "Mur."
B: "What?"
A: "I'm awkward."
by cary Euwer July 27, 2005
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Word that people say to connotate negative feelings; in most cases, a feeling of dissatisfaction. A distant cousin of the words 'shit' and 'fuck', it is of the lesser known cusses.
*woman hands man sandwich*
Man: *takes bite* .. mur.
Woman: What's the matter?
Man: Not enough mayo.
*hands back*
by BuildTheBear July 16, 2011
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