Miller attended Canadian Academy, where he graduated in 2012. Not much is known about his personal life, as he attempts to maintain his privacy, such as in his video "Filthy Frank Exposes Himself???" where he reveals that he's a college student in Brooklyn, New York and that he does not want to reveal personal information, for fear of not being able to get a job later on due to the nature of his show. Additionally, in the same video, he reveals his struggles with his health, such as his seizures caused by an illness of which he doesn't reveal.
Miller created the Filthy Frank character during his time on his DizastaMusic channel, where he created sketch comedy-based content, but the channel started gaining popularity once he conceptualised Frank, who is described as the anti-vlogger of YouTube. The first known video on this particular channel was uploaded on 19 June 2008, and was titled "Lil Jon falls off a table". The DizastaMusic channel has over 800,000 subscribers and is nearing 170 million views as of August 2017.
On 15 August 2014, Miller uploaded a video to the DizastaMusic channel, announcing that he would not be posting any more video content onto the channel, under the risk of losing the channel due to the numerous copyright strikes it received.
In Miller's new channel, TVFilthyFrank, he posts new videos, usually only with himself, and occasionally iDubbbzTV, MaxMoeFoe, and Anything4Views. He has many different series on his channel, such as "Food" (), "Japanese 101", and "Loser Reads Hater Comments". His content often relies on absurdity and offensive humor, using racial slurs and crude language and performing obscene actions. Regardless, he is in the top 500 YouTubers, at #407, with a total of 5.1 million subscribers and 600 million views as of August 2017.
Miller opened a third channel, TooDamnFilthy, on 1 July 2014. As of August 2017, TooDamnFilthy has 1.7 million subscribers and 170 million views.
Miller has a passion for music composition. He has expressed that even before his YouTube career, he was always into creating music, and created his YouTube channel as a means of promoting his music. In an interview with Pigeons and Planes, he said "I've always wanted to make normal music. I just started the YouTube channel to kind of bump my music. But then Filthy Frank and the Pink Guy stuff ended up getting way bigger than I thought so I had to kind of roll with it."
Under his comedy rap stage name, Pink Guy, Miller has produced two mixtapes and one extended play, Pink Guy, Pink Season, and Pink Season: The Prophecy, respectively.
Future plans include a "long overdue" tour, a third Pink Guy album and more progress being made on his personal music outside of the Pink Guy persona. He has also been announced to perform at the "It's The Ship" festival in November.