a strike up word. usally used on aim by guys who are too scared to talk to the girl they like or incredibly hyper people. also a great word to use if someones talking to you and you dont want them to.
john: moo
Jane: wtf?
john: idn wat^
jane:nmu
John: cool ... so on and so forth till the girl realizes wats happened and thn has to leave all of a sudden

Kyle: hey
jon: moo
kyle: wat
jon: moo
kyle: ok i g2g fag
by notamoocow April 16, 2005
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A sound made by people who are so tired that they don't care if people think they are cows.
Fred: Moo
Sally: Wow! Fred is a cow!
by Derald October 7, 2006
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Hes a funny ,smart and kind person he stupid sometimes but always a good loyal friend

He belongs in THE RAINBOW SQUAD

Which only includes lit people
by Helloimkms1111111 June 9, 2018
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he is caring and lovable and the best stuffed animal you could every have. typically is seen wearing a tiny hoodie and always hugging a child or teenage girl in need. get yourself a mr. moo moo they are the the greatest thing ever.
bro go fetch me mr. moo moo I need him
by Kahlia K. December 10, 2018
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a lying cheating nigga who treats women poorly and/or has white 'spots'
by Angelinee January 7, 2017
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A "moo" is a response or terminology for a made-up or random statement or word made reproaching a question or starting statement that may or may have nothing to with the subject matter at hand. 2 a way of avoidance of truth, or to throw your the questioner off i.e., sidetrack to new thought.
Subject 'A': "Darvskins where were you last night?"
Darvskins: "Back in Amsterdam we didn't think is was polite to put your elbows on your face"
Subject 'A': "What?"
Darvskins: "Moo."
Subject 'A': "Oh. . . Um, okay."
Darvskins: "meow."
Subject 'A': "Stop that!"
by -duskins October 5, 2006
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