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1.
mueah is word used to describe retarded people, also pronounced 'murrh'. while youre talking and you cant pronounce a word properly you say 'mueah' really loudly.

it can also be used when you dont want to talk to someone, or you dont know the answer to a question, a substitute for 'meh'.
'hey you know that guy called rajkart- rajkartif- MUEAH'

'hey whats up dude hows it hangin?;
'murrrrrrh.' *walks away*
by Jesta the Molesta December 13, 2010
 
2.
A word for a gay person.

It is also a gay synonym for meh. meh is better.
He is a mueah
by Mike287 December 20, 2010