an expression used when someone discovers another person up to no good (see Molina)
Orthographic Variants:
yeye
Alonso de Molina:
ye ye, yy, yeya. a a . delque halla a otro haziendo algun maleficio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 35r. col. 1. Thanks to Joe Campbell for providing the transcription.