An interesting list of "Old English words we should still use today," including this one that applies to my profession:
Ultracrepidarian (n): "Somebody who gives opinions on subjects they know nothing about."
Lot of that going around these days. In fact, just call me the ultracrepidarians' page editor. I also like this one:
Snollygoster (n): "A shrewed, unprincipled person, especially a politician."
Lot of them around, too. And more than a few ultracrepidarian snollygosters as well.