to gossip about someone in a negative way, to say bad things about someone; from a- (not), cualli (good), itoa (to speak) (see Molina)
Orthographic Variants:
aqualitoa
Alonso de Molina:
aqualitoa. nite. (pret. oniteaqualito.) dezir mal de otro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7r. col. 1. Thanks to Joe Campbell for providing the transcription.