a mischievous or shameless person (see Molina)
aquen tlathuiztli. lo mesmo es que aquen tlattaliztli. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7r. col. 2. Thanks to Joe Campbell for providing the transcription.