something unrefined or something indiscreet (see Molina)
Alonso de Molina:
ayeyecauhqui. cosa tosca o basta, o cosa sin discrecion. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 3v. col. 1. Thanks to Joe Campbell for providing the transcription.