What is Muhh?
1.
Feeling for someone who is a Shloompa, A dance for the depressed where one makes a sad face, swings his arms around, shakes rapidly, and says "Muhh!"
I think Johnny's a shloompa, I saw Muhh-ing yesterday
See
2.
An expression used in online chats such as on Internet Relay Chat; usually signals boredom, fatigue, or a simple lack of things to say.
May also be turned into other verbal-imitation expressions such as "Eh," "Mehh," et al.
"Muhh...I'm so bored..."