to get out of trouble (see Molina: salirseme el sieso); this expression seems to be tied to cuilchilli, the anus, in some way (SW)
IPAspelling:
kwiltʃilkiːʃtiɑ
Alonso de Molina:
cuilchilquixtia. nino. salirseme el siesso. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 26v. col. 2. Thanks to Joe Campbell for providing the transcription.