Indifference; to be used when one simply does not care.

"The verbal equivalent of a shrug of the shoulders." -quoth me

used in the greatest tv show of all time The Simpsons. in the episode Hungry, Hungry Homer, bart and lisa respond to a homer inquiry with "meh". mystery solved

An interjection used to imply indifference towards a subject; "a verbal shrug". This particular interjection has somehow become quite popular among teens, the reason for this popularity is a mystery. Other popular interjections are "bleh", "dah", and "mih". Usu. pronounced shortly, without eye contact or body movement.

This is a universal, non-commital answer to every question ever posed. Its the answer that deosn't actually give any answer.

Meh is used to describe any and every word possible, including:
Yes
No
maybe
kind of
never
always
ok
alright
no thankyou
yes please
look bitch i really dont care so just shut the fuck up
if you want
whatever
If you wnat
i dont want to really
well
shut up
i dont really care
no honestly, i dont care...

...and is never explained on which is actually used...

A random word when people either don't know what to say, don't care, can't answer a question or are too drunk to form a coherent english phrase.