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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
 
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
 
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
 
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