I don't know where I first heard this term. Supposedly the CIA, when in USSR used a piece of thread wrapped around the gun and their belt. The gun carried IWB of course. If they had to toss the gun they didn't have a telltale holster to deal with. I've tried it on limited occassions and it seems to work pretty well. It's a cheap solution and it keeps the gun from falling down your pants. I'm not advocating this for non-licensed carry. That would be very foolish.