1) A gramatically incorrect substitute for "me", "I", or "my" used informally (when used in place of "I", add an "S" to the verb following it. Ex. Meh wants to play.); also "Mah"
2) An express of indifference or boredom; a verbal "shrug"
Slang word in Singaporean English (Singlish)
(a)used to signify some form of uncertainty or disbelief in response to some claim/statement by someone else, and feeling that you should believe them.
meh (pronounced in 1 second or less, making a shocked face)
(b) can also be used rather condescendingly to signify distrust, but you'd have to drag it out 'mmeehhhh...'
meh (drags out for about 2 seconds, making a 'yeah right...' kind of face)
Ah Wing: i saw a ghost yesterday
(a) Bala: really meh?!
translation: i don't believe it...but hearing you say that i kind of feel i should believe it.
Ah Wing: i can eat 10 cheeseburgers in 1 minute
(b) Bala: really meh...
translation: yeah right.. /who are you kidding?!
Used when you really don't know what to say and/or someone asks you what you think of something and you just think its ok. Or used if you are simply too lazy to say anything else.