The literal name. It means that there are only 2 genders.
XX and XY, no more than that. The other ones are deformations
Synonyms for 2 GENDERS
On this page, you will find 30 slang terms related to 2 genders. Some of the top words include: Pistil, Knob Jockey, Ido, man-whore, Wonder weasel, and 25 more.