Lol technically it's a corkscrew. I DO know that there is another trick by the name of a corkscrew (swinging leg up and rotating horizontal to floor as if doing a btwist.) The second corkscrew is actually more commonly referred to as a "540 twist", while this sideflip one is referred to as a "sideflip cork."
Not that name matters, but I'm sure JumpOff would know since he's more into tricking then I am. PLEASE FIND THE NAME!