A way to be safe when guys talk about letting borderline ugly girls go down on them.
It is very indefinite, so it can go either way.
Tom: Mad blowtential, don't you think?
Brad: Hell yesssss.
Or the other scenario:
Brad: Bro, you see that new chick at work?
Tom: Hell yeah, mad blowtential!
Brad: Dude, that is disgusting. I was going to say she was sick.