Yared
That Guy
Man or Woman, who wouldn't want someone like that for protection? (mischief)
Gender is far from binary of course, but even sex itself can't quite be shoehorned neatly. Incidentally, even if the IAAF rules that she can't compete as a woman, that doesn't change the fact that she self-identifies as such and should therefore still be considered a woman.
If only there was a way to visually verify whether a person was a man or a woman... something obvious that would stick out... perhaps if you looked in a particular direction like, oh let's say, down.

Oh pish n' tish amiguous genitalia! If you can have babies, yer a woman! If you can't, yer a man!
A loop-hole to win more medals in sporting events. Maybe someone like North-Korea will cut off their male athletes' penises to win more honor in the Olympics now.
Isn't it possible to have both testicles and a womb mashed together in there?
So the South African middle distance runner Caster Semenya is under suspicion of not being who she says she is. She underwent a sex verification test before the race, but the results remain unpublished.
Bah, obviously a fake. Semenya was really born in Kenya!