The Sick Sick Sinners are a psychobilly trio composed of Vlad, Mutant Cox and Magrão from Curitiba, Brazil. The trio was born out of a few rehearsals at Mutant Cox's house in 2005. Around that time Cox discovered he was stuck playing the slap bass instead of the guitar as he originally planned. Vlad and Cox used to play together with "Os Cervejas" and then "Os Catalépticos". Duma came to play drums and together they recorded their first demo "We are the Sick Sick Sinners" which would eventually help spread their name beyond Brazil.