death by drowning, someone who has drowned in water (see Molina)
Orthographic Variants:
atlan micqui, atlammicqui, atlanmicqui
Alonso de Molina:
atlam micqui. ahogado en agua. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 8r. col. 2. Thanks to Joe Campbell for providing the transcription.