look up any word, like smh:
 
1.
1. A word used to describe an emotive state in a very simple way.

This word means multiple things, depending on which context the word is used.
"How are you today?"
"Mergh."
by Zyrra April 14, 2006
 
2.
A mixture of indifference, disappointment, annoyance, and anger.
Often used to express an undiscribable day or when you feel like someone has worked your nerves.
Annoyance Disappointment Indifference Anger
Mergh! Are you serious we've been here for HOURS!
by AlwaysFedUp December 12, 2010
 
3.
A more pronounced version of meh ie, not only are you uninterested or indifferent, if pushed for an opinion either way, then you are gonna go postal on the foo dang's ass who is bugging you.
Usually used as a warning after several instances of 'meh' have already being expressed.

"MERGH, I dont fucking well care! Now, Im gonna wig split yo' ass!"
by originalpsychobitch February 17, 2006
 
4.
Invented in Stratford England, this world is a aggresive form of the word meh. Commonly pronounced (mer-gu-hu)
A: What is the time
B: Mergh!
by Dominic99999999999 July 15, 2006