something that tears clothing; or something that lacerates, mangles, or dissects (see Molina)
IPAspelling:
teːtsotsomoniɑːni
Alonso de Molina:
tetzotzomoniani. rasgador de vestidura, o despedazador. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 111v. col. 1. Thanks to Joe Campbell for providing the transcription.