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2.
In AIM speak, the sound of apathy or indifference.
A: If you're so bored, find a hobby.

B: Mreh. I'll probably just watch TV.
by Joe Delk October 20, 2006
 
1.
1. A sound of annoyance, often used to segway into a conversation about why one may be so annoyed.
2. A filler word, used to imply "I'm so bored, but I don't know what to say to start a new conversation."
3. To be shutdown.
4. Implies boredom/confusion with a conversation, so much that one is too lazy to debate it.
A: Mreh.
B: What's wrong?

A: ...and that is how I solved the dilemma of "how to clean my bathroom sink"
B: Mreh.
by X...like the drug...but not April 10, 2006
 
3.
an utterance or sound made in exasperation or despair
Girlfriend: "I don't want to have sex right now."
Boyfriend: "Mreh."
by Josh Doggett February 01, 2007
 
4.
a sound that kitties make when they purr
"That kitty just said 'mreh'!"
by Matty Kitty November 01, 2005
 
5.
"Mreh" is the sound you make when you are either hit with a heavy object, under a lot of stress, or nervous.
"Mreh! I can't take this anymore!"
by Rekki May 21, 2005