Over the years, I have heard a lot of names for our manlyhood.
But it is the first time someone calls it a bar.
Although the people you are kneeling might be honored you call it that way.
I may be mistaken but I think what Don meant about "Kneebar" is applying a leg lock on his uke more specifically on the knee. This usually happens in bjj or submission grappling...hurts quite a lot too...at least you can tap tho...unlike when doing a break fall...