WTF is even this pose?

Not trying to pick a fight with a pose, but genuinely asking: wtf is even that? I keep seeing it everywhere and I don't know why—I'm not exactly weirded out by it, but I feel like something is going on, or off, or... I don't know. My intuition is intuitioning. Is this a girl thing? Wanted to say this, and there... said it lol.