I learned a new word the other day—ultracrepidarian. I haven’t yet been able to work it into conversation, but I look forward to doing so. The word describes a person who offers opinions, judgments, etc., beyond his or her expertise. As a noun, it refers to such a person.
Ultracrepidarian is such a great word to describe Republicans who pontificate on subjects such as human reproduction, climate change, or economics. In fact, by extension, I think one might refer to the Republican Party as the ultracrepidarian party.