MU 

An acronym that means Mutual Understanding

Person 1: 'you two officially broke up?'
Person 2: 'yeah, we had a MU and ended it peacefully.'

MU by Kitten0407 April 9, 2017

Mu 

Someone who uses super long words to flex on others less intelligent then them. Usually on a discord chat whilst being owned.

Mighty Mu

Mu by dafukrdat November 8, 2018

Mu 

A little cute ball

Look at that nice mu! It's all round and cute!

Mu by Kitkatmu December 6, 2011

MU 

Multi-user: Multiple users.
Often used for online games or puzzles, originally for one person, that has been adapted or recreated for multiple users.
OR:
- Collaborative
- anything implying multiple users

See also MUD (Multi User Dimension, Dungeon or Domain)

Multi user game, Multi user version, Multi user solitaire card game.

MU by yupp November 16, 2007

Mu 

A short way to say me and you. Not many uses, if you are gramatically correct, but who is?

Mu got in so much fucking trouble that day.

Mu by XtfotX January 22, 2009

mu 

it means my universe.

textin** NI: U are sooo cute stinkkk Zyia : THANK YOUU MUUUU

mu by Niya<3sJAY March 5, 2022

Mu 

The name of a almighty god in an Rpg that can not be beaten. If you think of a way to stop hime he'll just trump your character anyway. Created by the Wing of Yig

"Mu is the immortal god of darkness."

Mu by TimeStand July 26, 2004