a womanizer; or, a "bad" woman (see Molina)
ciua tlaueliloc. hombre dado a mugeres, o mala muger. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 22v. col. 2. Thanks to Joe Campbell for providing the transcription.
Relates to tlahuelia, to be angry with.