Apparently
He was right

http://www.urbandictionary.com/define.php?term=meh

Meh
"It is a real word", he said.
"No it isn't", I said, "It's an irritating noise made by sheep".
"It's in my Simsons comic", he said. It says its in the dictionary meaning an expression of boredom".
"I don't believe you." said older son, watching the football.
"Dad - where's my Simpsons comic?"
"Its in my bag downstairs".
"No - not that one the other one, in my room. Where is it?
"In your room. " I said.