It is "duvvelsheyss", and is most often said by dwarves and elves as a swear word. Perhaps the "sheyss" part was inspired by German, but what is a "duvvel"?
sounds like double shite. wonder if its the same meaning. regarding pam pam param.... freakin hilarious... my coworker and i go around saying pam pam param at work and everyone thinks we're off our rocker.