for water or some other liquid to flow or spring from many places (see Molina); from other examples, this would include breast milk
IPAspelling:
mehmejɑ
Alonso de Molina:
memeya. (pret. omemeyac.) manar agua ocosa liquida por muchas partes. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 55v. col. 1. Thanks to Joe Campbell for providing the transcription.