Coroner can be a tricky word to say. There’s something about the R in the middle that could trip up a not so careful speaker. Put that R at the beginning and it’s no trouble at all. You could say CROWNER while drunk as a skunk but I’d bet coroner would be a real stumbling block if you had a few in you. This may, in fact, be the situation of these gravediggers. They have certainly been played drunk more than once.