Verb. Through the internet, to send back and forth images between two individuals interested in eachother. Often very revealing pictures of themselves.
-Usually with a kiss don't tell policy, without the individuals ever really meeting up to do anything. (perfect for long-distance relationships)
"This guy is soo hot. I've been photo-volleying for like a week now, and I bet he's been joing to like half the pics i sent him."
"I wish she was here right now so we wouldn't have to keep photo-volleying eachother... rrg."
"What the fuck man? All these pics of you are like, half-naked!"
"Hahaha, those are for this girl I'm photo-volleying in like Kansas or something."