The 'Suddenly I See' singer will appear in the surreal comedy's fourth episode as musician Briiian Raggatan.
The unhygienic singer is a favourite of the regulars in the Moosic Tavern and is famed for his signature song, which pays tribute to an as-yet-unnamed item that is "blue, wet, onion-like and totally addictive".
Catherine Tate, Simon Callow and Jennifer Saunders have also signed up for cameos on This is Jinsy, while pictures of Harry Hill, David Tennant and Peter Serafinowicz on the show were previously unveiled.
This Is Jinsy, which is created by and stars newcomers Chris Bran and Justin Chubb, will air on Sky Atlantic in September.
Watch a trailer for This Is Jinsy below: