Our LCM Classic this week is the big smash hit "Mas, que Nada!" a song written and originally performed in 1963 by Jorge Ben Jor on his debut album, which also became the Sérgio Mendes' signature song in his 1966 cover version. It was voted by the Brazilian edition of Rolling Stone as the 5th greatest Brazilian song and it was inducted to the Latin Grammy Hall of Fame in 2013
Brazilians use 'Mas Que Nada' (or just que nada) colloquially to disagree with someone. A fitting English translation might be a sarcastic "Yeah, right!"