The term in general does nothing for me.
But that wasn't what you were asking (i read ya see0 and that nasty ass on the vid? Yeah that looks like a permanently prolapsed rectum.
Not my bag of interest seeing a rosebud in porn. At least those are temp. They would be mucosal prolapses, if i am not mistaken. This one is looks like a full on prolapse combined with severe 'roids. I am not a doc so could be wrong.
Fisting done right, hell anal play period done right), should not result in this. Improper forcing and such, along with severe constipation or diarrhea can result in both piles and prolapses. Wanted to throw that out there. I know some people who have participated in extreme anal play and their assholes look NOTHING like that. *shudders*