Oh that's just an old nick name, it evolved; Camier - Camshaft - Shaft - Shafter. There are other things behind it as well as to why they thought it was funny.
Lastly, do you ever dangle a leg into corners?
Yes, it's a balance thing. When you're hard on the brakes, a bike can easily get crossed up going into a turn and sticking your leg out gives you better balance when you're hard on the brakes. It depends on the circuit, bike and how hard you're braking as to how much you need it.
Thanks for that Leon and good luck with the knee.