>>23465976
"egg" is a term used to refer to people who are trans but haven't realized it yet, haven't transitioned yet, etc. Basically, they "haven't come out of their shell" it's also a term used by the more pushy and obnoxious members of the trans community, who try to force the idea that "oh you like girly things? you must be an egg!" and the like.
As for actual girls with dicks in AoZ, htere's picrel, one of the puru clones that came out as a femboy/dickgirl due to a fuckup in the clonin process, and then there's all the TR-series MS who are always depicted as bunnygirls, and have massive schlongs.