You are a ruffian that will swear, drink, dance, revel the night, rob, murder and commit the oldest of sins, the newest kind of ways. Actors need very specific mental images for all bold words. For instance: the swearing might be particularly loathsome, the drinking Herculean and the dancing completely uncontrolled. Revel the night might imply someone who stays up till sunrise and then sleeps most of the day. The robbing might be of the weakest prey - the grocery money of old women - and the oldest sins might be sexual with all sorts of innocent victims. The clearer each vice is in the speaker's mind, the more justified the insult will seem.
Color the language with thought. Decided exactly WHY each word is chosen.