A classy-sounding way to refer to your anus.
The term comes from the Chicago-based chocolate company, Fannie May, because both need to make fudge every day and in a large variety.
Hannah: Did Amina hook up with her ex last night?
Fatima: They got to the bedroom but Zainab walked into the room and took her away.
Miraal: What a fannie nannie!
sometimes used as another word for butt, but also used as a name. Fannies are wonderful people who are really really pretty and nice and talented and make the best cousins in the world. Everybody loves them and wishes they were a Fannie!
Basically the most awesome people in the entire world.