my research about moo.

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intr.v., mooed, moo·ing, moos.
To emit the deep, bellowing sound made by a cow; low.

n., pl., moos.
The lowing of a cow or a similar sound.

The noun has one meaning:

Meaning #1: the sound made by a cow or bull

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The verb moo has one meaning:

Meaning #1: make a low noise, characteristic of bovines
  Synonym: low

Dansk (Danish)
v. intr. - sige muh, brøle
n. - muh
Nederlands (Dutch)
loeien, boe(geluid)
Français (French)
v. intr. - meugler
n. - beuglement
Deutsch (German)
v. - muhen
n. - Muh
Ελληνική (Greek)
v. - μουγκρίζω, μουγκανίζω
int. - μου, μουγκανητό
Italiano (Italian)
muggire
Português (Portuguese)
v. - mugir
Русский (Russian)
мычание, деньги, мычать
Español (Spanish)
v. intr. - mugir
n. - mugido
Svenska (Swedish)
v. - säga mu, råma
int. - mu!
中文（简体）(Chinese (Simplified))
鸣叫, 牛叫声
中文（繁體）(Chinese (Traditional))
v. intr. - 鳴叫
n. - 牛叫聲
한국어 (Korean)
v. intr. - (소가) 음매 하고 울다
n. - 울음소리, 바보 같은 여자
日本語 (Japanese)
n. - モーという鳴き声
v. - モーと鳴く
العربيه (Arabic) 
‏(فعل) يمعي, يخور‏
עברית (Hebrew)
v. intr. - געה
n. - געיית פרה, מו

MOO

Short for Mud, Object Oriented, a specific implementation of a MUD system developed by Stephen white. MOO is in the public domain and can be freelydownloaded and executed.

Conclusion
bago na ang  ibig sa bihin ng MOO  kakabago lang namin. hahaha. 
un ay "My One and Only" kahit anung sabihin nila un parin ang meaning na tanging alam ko at gusto ko. I love u MOO.