I came across this article today on The Huffington Post and fell in love at first sight:
ultracrepidarian (adj) – noting or pertaining to a person who criticizes, judges, or gives advice outside the area of his or her expertise;
(n) – an ultracrepidarian person.
If that is not the best word you have heard in a long time then you had better tell me what is because I need to know it!
Now to find an appropriate time to slip it into a conversation…