a fastidious, angry, or peevish person (see Molina)
Alonso de Molina:
commatini. persona melindrosa, sentida, o mohina. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 24r. col. 2. Thanks to Joe Campbell for providing the transcription.