Oh yes, only a couple of days ago was I was only looking in the Grandiloquent Dictionary for an insult or two and spotted it there, next to sgriob (a word I often slip into conversation).

sgiomlaireached - The habit of dropping in at mealtimes
sgriob - The itchiness of the upper lip just before taking a sip of whiskey
shaconian - A person who believes Francis Bacon wrote Shakespeare's works

http://www.islandnet.com/~egbird/dict/s.htm
Mind you, this is the only reference to be spat out by Google (and even for really obscure things there are usually at least a few more) someone out there could be extracting the Michael!