Backdated…
A favourite word…
What it means? Let see…
Wikipedia:
"Meh" is an interjection, often used as an expression of indifference or boredom. It can also be used to indicate agreement or disagreement. It can also be used as a verb, (rendering something uninteresting or boring) and an adjective, meaning mediocre or boring.
You can also try the urbandictionary?
So yeah… Meh…