It's an underflip for sure. Your rotation is the same as Vinnie's when he first debuted that trick back in 2000. Take a look at 0:59 from his segment in The Game. The similarities I'd call out is that the rotation has the same set like a lincoln loop and the same finish with the feet coming back down like a switch front.
[video]https://www.newschoolers.com/videos/watch/315661/Vincent-Dorion---The-Game--2000-?jwsource=cl[/video]
