A designer woman is a woman who is so apparently perfect that she seems tgtbt and, if she was a real woman, could very well be tgtbt.
To describe a designer woman would be to run down a list of specifications drafted by lovers of women.
The only true designer woman that exists is a virtual woman, one that only exists in an unreal world.
These include six, jessica rabbit, and, oddly enough, turanga leela.
Doghorn Sexhorn: What you need, my boy, is a designer woman