At first booed at the 1967 Rede Record festival for its use of electric guitars, Caetano's interpretation and attitude eventually won the audience over.
[1] Caetano has called it his "best-known song", comparing it to the Rolling Stones' "(I Can't Get No) Satisfaction" in terms of its place in his oeuvre.
[2] He partially based the song's composition on the previous year's winner, Chico Buarque's much more conventional "A Banda", purposely incorporating controversial rock and roll instrumentation – provided by the Paulino band The Beat Boys – to provoke the crowd.
[1] Caetano took the title phrase from the popular TV personality Chacrinha, who had in turn borrowed it from singer Wilson Simonal.
[3] The song is, alongside Daniela Mercury's "O Canto da Cidade", remembered by the population for the 1992 Fernando Collor de Mello impeachment.