Green’s Dictionary of Slang

(US) the (usu.) female pubic area.

1930		C. Bracey ‘Cherry Ball’ 🎵 Won’t give my baby no more cherry ball / I won’t give my baby no more cherry ball / ‘Cause she may get drunk, Lord, and show her Santa Claus.
1931		R. Perryman ‘New Dirty Dozen’ 🎵 Your big fat sister and your little brother Sammy / Your auntie and your uncle and your mas and pas / They all got drunk and showed their Santy Claus.
1934		C. Fletcher ‘Dresser With the Drawers’ 🎵 If you were a dresser, I would pull open your drawers / And I’d take a peep at your little Santa Claus.