a person who is constantly angry, or irate (see Molina)
Orthographic Variants:
qualanini
Alonso de Molina:
qualanini. persona que se enoja muchas vezes, o yracundo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 84v. col. 1. Thanks to Joe Campbell for providing the transcription.