the fall of dandruff or of the like (see Molina)
yuyupeuiliztli. caida de caspa, o de cosa ansi. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 44r. col. 2. Thanks to Joe Campbell for providing the transcription.