a troublemaker, one who gets in among people and stirs them up (see Molina)
Alonso de Molina:
tetzalan tenepantla motecani. malsin que mete mal entre otros. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 111r. col. 1. Thanks to Joe Campbell for providing the transcription.