someone that sleeps with his or her eyes open (see Molina)
IPAspelling:
mikkɑːkotʃki
Alonso de Molina:
miccacochqui. el que duerme los ojos abiertos. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 55v. col. 2. Thanks to Joe Campbell for providing the transcription.