to warm one's back with the rays of the sun (see Molina)
Orthographic Variants:
teputztotonia
Alonso de Molina:
teputztotonia. nino. (pret. oninoteputztotoni.) callentarse las espaldas al sol. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 103v. col. 1. Thanks to Joe Campbell for providing the transcription.