Phan

Phan is the slash ship between Daniel Howell and Phil Lester from the YouTube fandom.

Canon
Dan and Phil first met, when Dan contacted Phil over twitter asking for editing tips on Youtube videos.

Fanon
Many of their fans ship them, secretly thinking their together. Although many do argue that if they are hiding their relationship they are doing a lot to hide it. Fanfiction for the two ranges from them getting together, to AU's of them in different situations.

Fan Art of the two is also very common. Many like to draw them as characters from other franchises like Death Note, or Free!. Someone once made a fan art of Dan as Christopher Robin and he became very emotional over it.

Video edits are also very popular. There are the one's common in most fandoms of moments between the two with music in the background, but many also like to make compilations from their videos. The compilations could be people's favorite fan moments, theories of them being a couple, or even just how many times Dan has fallen out of his chair.

Fandom
AO3

YouTube
 * DanAndPhilGames
 * AmazingPhil
 * danisnotonfire

Trivia

 * The two are aware of the ship, and even occasionally read their fanfiction
 * Both love anime