That's what I've started calling the fly patch on my fly fishing vest. You can usually tell how good the fishing was by how many flies are on my failure patch. If there are one or two, the fishing was pretty good. Three or four flies... I probably caught a couple. More than four: FAIL. No fish. Unless it's been a really long fishing day, but even then there are no guarantees.
Seth and I went out fishing on the Snake River over Thanksgiving break. The first day of fishing went well and we both caught several whitefish and a rainbow or two. The failure patch collected a couple flies, but remained pretty sparse for the most part. The second day of fishing did not fare so well. We both caught a couple fish during the span of several hours, but it took a lot of work to do so. By the looks of my failure patch, you'd think I came away skunked. Luckily the copper "Prince-of-a-Bugger" streamer I tied on to use while I made my way over to Seth when it was time to leave actually produced a nice rainbow. Good thing too. There wasn't much room left on my failure patch.
Oh and just for the record, I caught two fish at the same time. Two whitefish to be exact... one took my bitch creek nymph and the other took a green hornet. I am the master.