From Fan History Wiki
Fail is a Meme which has evolved into a commonly used phrase on the internet, both inside and outside of fandom. The word "fail" in this context is often used to disapprove of a person or said persons' actions, opinions, words or behavior.
supergee made the following observation regarding the definition of Fail on June 11, 2009: "I wonder if one element in *Fail is a lot of people just wanting to vent about an emotional issue, and feeling that raising questions like this is male answer syndrome." 
Know Your Meme presents the following video demonstration and explanation of Fail:
This section needs more information.
- Failboat - a large "shipment" of Fail. May be a group of individuals all contributing to an incidence of fail, or continuing on in fail-worthy actions blithely ignoring the criticisms and cautions of others.
- Win - the opposite of Fail.
Examples of Fail in fandom include: