Explainer Sites, Ranked
1. Urban Dictionary
2. KnowYourMeme
3. Erowid
4. WebMD
5. TVTropes
6. Wikipedia
7. GameFAQs
8. Encyclopedia Dramatica
9. Rotten Library
10. Discogs
11. The Game of Thrones fan wiki
12. The Star Trek fan wiki
13. Wookieepedia
14. Yahoo! Answers
This post has been updated numerous times.