a person who has lots of gas, emits gas, has flatulence (see Molina)
Alonso de Molina:
miexini. pedorro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 56v. col. 1. Thanks to Joe Campbell for providing the transcription.