"You scoundrel!" — an interjection that expresses reprehension (see Molina)
Alonso de Molina:
nocne. a vellaco, para reprehender. interjection. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 72v. col. 1. Thanks to Joe Campbell for providing the transcription.