I have heard about it in relation to WW1 WW2 dogfights, the whole idea is that the plane almost stalls but not quite, and from what I heard about it it was used on those planes. I don't think it would work with a modern jet somehow. From what I understand it was used to get around turning-circle limitations. I don't think I have any examples though of it actually being done. I would examine though that as a manouvre it would take a lot of experience. I don't know, they may call it something else, or not know of it due to flying jets. It is something that I don't think anyone would perform today in one of those aircrafts because of the danger. If you like a 3 point turn by understanding is like a controlled total stall where you stall the plane in one direction and then level out in the direction you want to go. Actually it similar to that Gimlee Glider manouvre where you are using both the ruder and the flaps to slide-slip the plane down from a fast speed, probably the best example is what happened with that Glimlee Glider incident.