xixicuin.

Headword: 
xixicuin.
Principal English Translation: 

a glutton

James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 241.

IPAspelling: 
ʃihʃikwin
Alonso de Molina: 

xixicuin. gloton.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 159v. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

XIHXICUIN glutton, big eater or self-centered person / glotón (M), ambicioso, codicia, egoísta (Z) [(4)Zp.10,29,48,228]. See XIHXICUINOĀ.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 324.