1. (rhetorical figure): A reversing of the order of words in corresponding pairs of phrases.
leges supplicio improbos afficiunt, defendunt ac tuentur bonos (Cicero, De Legibus, ii. 13)
The laws VISIT PUNISHMENTS upon the wicked, but the good they DEFEND and PROTECT.
Extremely hot, above that of being hawt or even just plain old hot. Chiasmus is the best compliment you can give when talking about anothers looks.
Guy: Girl you be looking chiasmus today!
Girl: Yea i know.