to have chest pain or a stomach ache because of eating too much (see Molina)
IPAspelling:
eːltsitsikɑ
Alonso de Molina:
eltzitzica. n. (pret. oneltzitzicac.) lo mesmo es que elpantlatla. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 29r. col. 1. Thanks to Joe Campbell for providing the transcription.