Unisex sex Share definition Flag When a guy or girl has a unisex name and has sex with someone of the opposite gender with the same name. Guy 1: Alex and Alex are dating now. Guy 2: I guess there's some unisex sex in their future. Unisex sex by Cobalt-Alloy April 30, 2015 0 0 Get merch Get the Unisex sex mug. Buy Now — $32.95 See more merch