(Negerküsse / -köpfe). Also Mohrenkopf (Moor's head).
You'll occasionally hear an elderly German using the, erm, "traditional" name.
(, Mon 11 Dec 2017, 11:11, Reply)
I added a link to an article on the previous name. I guess Dickmann's is one hell of an improvement!
(, Mon 11 Dec 2017, 11:12, Reply)