Someone who believes their knowledge and use of the aphostrophe somehow gives them superior intellect to the average internet user. Conversely it highlights their inability to interact socially both in real life and online.
The term comes from fans of Conservative MP Anne Widdecom and her stuffy anal love of correct grammar and use of Queens English
Person One: "One common error in knowing when to use the apostrophe is that they are used for plurals. E.G, you might find them incorrectly used in the word ‘books’ in a sentence, such as 'There were many books in her bag'. It might be incorrectly written as 'book’s'. Used in this instance, it would indicate possession when it is simply a plural."
Person two: "Stop being such a Widdy and get a life!"