I heard a french player say it in a stream yesterday, and as @mekriff says, Inseong Hwang calls the shape a scorpion shape in 3-3 invasion type joseki.
The first two are from playing 3-3 point openings and the opponent letting me get an outside hane (kind of big and mini scorpions )
The 3rd one is more properly from a 3-3 invasion where much later I was chancing my arm trying to live, and the atari was not the right move in this case.
I heard Mathieu Delli-Zotti, a french go federation teacher, call it scorpion shape too. Very resourceful, it is often played since AI - was it used before? I wonder if it has a different name in Chinese and Japanese?
it arose from a double hane (J6, H7) then black played defensively (G6) and I protected the cut (J7) I read that the ladder was okay for white but later, I worried that it had been broken so played the tiger’s mouth (L6)
This is all just my analysis from new-ranks-9k aka DDK thinking so possibly dubious