tlaicampa.

tlaicampa. detras de algo, allende los montes, sierras, o puertos.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 121r. col. 1. Thanks to Joe Campbell for providing the transcription.

TLAĪCAMPA behind, in the back / detrás de Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 271. algo, allende los montes, sierras, o puertos (M) [(3)Zp.16,45,207]. Z also has the short variant TLAĪCAN. In all attestations Z marks the vowel of the third syllable long, but it is short in attestations of –ĪCAMPA across other sources. See -ĪCAMPA.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 272.