a man (or person) with a big nose (see Molina)
yacatomauac. hombre narigudo, ode gordas narizes. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 30v. col. 1. Thanks to Joe Campbell for providing the transcription.