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…