a spade or something similar with two edges; also, a gossiper (see Molina)
Alonso de Molina:
necoc tene. espada de dos filos, o cosa semejante, y chismero. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 65r. col. 1. Thanks to Joe Campbell for providing the transcription.