Hereabouts, we generally call that the "totally effed up, got no clue, hope for the best, maybe nobody got kilt, but if they did, oh well, doofus felling cut".
There was a pile of stuff in the yard next door to where I worked today, couldn't quite figure out what to call this cut.
View attachment 63028.
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Almost looks like what our local linesman do when cutting tops off of wooden hydro poles. Kinda holds it in place till you put the saw away and then push it.
This guy is a poor faller. He said he got a little scared on this one.