Gengahr are a British indie rock band from London. The band was formed at Stoke Newington School in Hackney in 2013. Though originally named RES, they were forced to rename after discovering an artist already called RES on iTunes. Their new name is a play on Gengar, one of the original Pokémon. Their debut album, A Dream Outside, was released on 15 June 2015. After BBC Radio 1 DJ Huw Stephens played their first single, "Fill My Gums With Blood" on his radio show, the band were invited to perform at the Introducing stage at the 2014 Glastonbury Festival.