to turn someone on end, feet up, in order to throw him or her into the water or over a cliff (see Molina)
IPAspelling:
tsonikpiloɑ
Alonso de Molina:
tzonicpiloa. nite. (pret. onitetzonicpilo.) boluer a otro patas arriba, para echarlo enel agua, o para despeñarlo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 153r. col. 2. Thanks to Joe Campbell for providing the transcription.