What is it?
That's my favorite part of photography. You can't make this stuff up, right? So people have no problem asking - contrast that with painting! Basically no one will ask outright "what is it?" for fear of offending, or of showing their lack of art knowledge (at least that's why I refrain from asking...). A painting doesn't have to be "of" something, in a literal sense. But we photographers, we are stuck with reality.
Which is why I love it so much! It's real, and it's not. It's a rock, or a field of wildflowers, or a rainstorm, or Boston in the fall, or... Right?! *swoon*