to not be bothered by things that happen to one, to not feel them, or not take notice of them (see Molina)
Orthographic Variants:
amo quẽ nocommati
Alonso de Molina:
amo quen nocommati. (pret. amo quen onocomma.) no se me dar nada por lo que acaece, o no sentir ni hazer caso de nada. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 5v. col. 1. Thanks to Joe Campbell for providing the transcription.