to make lumps or to cause bruises (see Molina)
xixipochoa. nitla. hazer chichones, o tolondrones. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 160r. col. 1. Thanks to Joe Campbell for providing the transcription.