MAIS QUE NADA - SERGIO MENDEZ AND BRAZIL 66

From Wikipedia:

"Meaning

In Brazilian Portuguese slang, mas que nada (literally, "but, that [is] nothing") means "come on" or "no way". This is sometimes confused with the Latin-American Spanish más que nada (literally "more than nothing"), meaning "mainly" or "principally"; though in more literary Spanish, "mas que nada" (note the omission of the accent, which changes "más" (more) to "mas" (but)) would have the same literal meaning as the Portuguese."