Smoshers is the semi-official name for the fans of Smosh (like PewDiePie's "Bro Army"). In an interview with the channel Young Hollywood, Ian and Anthony stated that they didn't come up with the name but more that the fans came up with it themselves and it just kind of stuck.
Community
Smoshers have created many quizzes and posted artwork about Smosh listed as Smoshers. There are Smoshers hashtags (#smoshers) on Twitter, Instagram and other social media sites. The Urban Dictionary also a post about Smoshers, describing them as "A tight community of amazing people who love and support Ian Hecox and Anthony Padilla from Smosh".