I was watching JoJo's Bizarre Adventure where Baron Zepelli introduces himself, and it sounds like he says ”私はZepelliだんしゃんだ”. Here's a link to the scene https://www.youtube.com/watch?v=XWaAct40xZ0&t=1m1s. I looked up the word for baron and found 男爵 / だんしゃく. Am I hearing it wrong, or is the trailing くdropped? If it is dropped, then is it just some Japanese dialect or is there a rule for it?