Meh means rubbish. It means boring. It means not worth the effort, who cares, so-so, whatever. It is the all-purpose dismissive shrug of the blogger and messageboarder. And it is ubiquitous. On the I Love Music messageboard, for example, 4,010 separate discussion threads feature the use of "meh"."
He thinks, however, it sprang into common usage from the Simpsons.
I can enlighten him further. Some credit the 2001 episode Hungry Hungry Homer with the first use of "meh" as a dismissal, when Homer asks Lisa and Bart if they want to go to the Blockoland theme park and receives the answer, "meh". But the Language Log website notes a 1995 episode in which Bart dismisses Marge's discussion of weaving with a "meh"."What about Feh?
Meh. More at guardian.co.uk