the act of taking shelter behind something; or to get close to the wall (see Molina)
Alonso de Molina:
netoctiliztli. el acto de ampararse o guarecerse detras de algo, o arrimandose ala pared. &c. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 70v. col. 2. Thanks to Joe Campbell for providing the transcription.