Ding Dong for boys and tuchus* for girls.
Both genders had fannies.
Tuchus is a slang term for butt or rear end. A slang term for your butt that is derived from Yiddish is an example of tuchus.
My understanding was that a girl’s part was called a tuchus.
I was listening to a pet psychic refer to her cat being forced to poop inside a plastic igloo and move her tuchus INSIDE where it should be instead of pooping in front of the pan.