when I see that... I think of several things, and none of them are likely what that implies.
like when you get a bottomless cup of coffee, just means you get free refills - so I imagine... well, I actually am not sure how that translates to women. but it sounds good to me.
or, since I can't see her legs, I think it is some sort of fetish convention for people that like amputees.
or women that have survived horrible mine accidents but have had their asses blown off.
that actually sounds pretty dirty "I'm gonna blow you ass off"
what were we talking about?