to beat the meat violently (to soften the meat by swishing or pounding it) (see Molina)
Orthographic Variants:
nacaxaqualoa
Alonso de Molina:
nacaxaqualoa. ni. (pret. oninacaxaqualo.) magullar carne. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 062r. col. 1. Thanks to Joe Campbell for providing the transcription.