to take pleasure in a dirty delight (i.e. a sexual pleasure) (see Molina)
Orthographic Variants:
tlayelpaqui
Alonso de Molina:
tlaelpaqui. ni. deleytarse con suzio deleyte. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 120v. col. 1. Thanks to Joe Campbell for providing the transcription.