pepeyotza.

Principal English Translation: 

to give someone the shivers, to make someone's skin crawl (See Karttunen)

IPAspelling: 
pepeyotsɑ
Frances Karttunen: 

PEPEYOTZ(A) vt to give someone the shivers, to make someone's skin crawl / le hace cosquillas, siente andar algo en la piel (T) [(3)Tp.196]. This should relate in some regular way to M's pepeyoca 'for something to shimmer with reflected light.'

PEPEYOCHILIĀ applic. PEPEYOTZ(A).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 192.