toward hell (see Molina), i.e. toward the underworld; also, to the north
Orthographic Variants:
mictlampa uic, mictlanpa huic, mictlanpa uic
Alonso de Molina:
mictlampa uic. hazia el infierno. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 56r. col. 2. Thanks to Joe Campbell for providing the transcription.