The artistic expression in photography when upon a field study, trends can be found from photograph to photograph such as the same models, the same poses, or leading with one's "best side" facing the camera every time a frame is captured.
An Occo is also one's instinctive pose one snaps to automatically when a surprise or spur of the moment photographer raises a camera.
A. "Dude why does Stacy always take pictures with her hand on her hip?"
B. "Man that's her Occo, her thumb's kind of jacked up from a vicious dog attack when she was a child so she hides it in pictures."
A. "Oh, that makes sense."
A fast talking, loud person who will not let another person get a word in edgeways, therefore good at gossiping and arguing.
Good god that girl was an occo.