Funny, though I still don't get it.

Agreed, and neither do I, but I love it. Even funnier with the music.

O
X

It's basically a full-body thumbs up/thumbs down. Go Japanese game shows.

its a umezzo parody

what is there not to get?
It's thumbs u....DOWN!

It's in response to Ryuuji's question.
He asked her if she liked people who think of themselves as airheads. And her answer is: NOPE.

Then let's celebrate with a new tag: "O_X". ...or "o_x". Yeah--that'll work.

Tagged o_x and wiki'd.