This morning I listened to another episode of the superb radio suspense-horror program "Quiet Please." This one was called "13 and 8" and was about a coded phrase that 1940s photographers supposedly really used.
According to the program, photographers have to be on the lookout for "lens-louses" who want to get in the shot, just so they can see themselves in the paper. Apparently many pictures get ruined if a photographer fails to notice a lens louse.
So whenever a photographer notices one of these people lurking around, he'll yell "13 and 8" to warn the other photographers about the person. They all position themselves to make sure the lens louse can't get in the pictures.
This may not be true, and Google isn't suited to dealing with phrases like "13 and 8." Google removes the "and" so you end up with millions of pages with the numbers "13" and "8" on them. Completely useless.
Still, this reminds me of another potentially true story about early-'40s photographer lingo. Whenever a homicide ocurred in a big city, folks would wander out on their fire escapes to watch the police do forensics work. Some of them were women wearing only bathrobes. Photographers at the scene would try to position themselves under the fire escapes and look up through the grills...if they saw a woman who wasn't wearing underwear they'd yell "beaver shot," and the other photographers would gather around to take sneaky photographs of early-morning vaginas. This is where the term "beaver" comes from, apparently.
Again, I don't know if this is true or not. And you can imagine the sort of pages that Google finds when you type "beaver shot."