a player who plays with a rubber ball using the buttocks (see Molina)
Orthographic Variants:
ullanqui
IPAspelling:
oːllɑnki
Alonso de Molina:
ollanqui. jugador desta manera. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 76r. col. 2. Thanks to Joe Campbell for providing the transcription.