A woman claiming to have been impregnated by Flo Rida is suing for child support — but not just any child support … she knows she hit the jackpot, and now she wants “good fortune” support — which means she banged a rich person.

Glamor model and video vixen Natasha Georgette Williams — who says she hasn’t given birth yet — and her attorney Ray Rafool, filed the legal docs in Miami … asking for a bunch of Flo’s money for things like pre-natal assistance and other birth-related expenses.

She also wants a child support order to cover medical insurance, daycare, private school expenses, summer camp, etc.

But the hilarious part — she also asks for “good fortune” child support … which is a special kind of child support in Florida for rich people’s kids. Basically, she’s asking for more child support than she actually needs … just because Flo’s rich. You can’t make this up.

We called Flo’s people for comment. So far, no word back … but it’s worth noting paternity of the child still hasn’t officially been established.

In other news, Natasha’s really hot. (SAYS TMZ)