Balada is an interesting Brazilian Portuguese word because, unlike the English “ballad,” it usually means a night out, club scene, or party. In the song, "amor de balada" describes a casual romance that begins during a night out and ends when each person goes home, giving the phrase a distinctly Brazilian cultural meaning.
"Amor De Balada" is MC Kekel and Mc Don Juan being completely upfront about a no-strings fling. The title means "club love" or "party love": balada is Brazilian slang for a night out at a club or party, not a ballad. That one word explains the whole song.
The story is simple. "A gente fica dias sem se ver" (we go days without seeing each other), but "quando se encontra, sempre rola tão gostoso" (when we meet up, it always goes so well). Rola is a handy slang verb here, meaning "it happens" or "things go". They admit "o nosso lance é meio louco" (our thing is kind of crazy), where lance means a casual thing or situation between two people. People assume it is planned, "Quem vê acha que é combinado" (whoever sees it thinks it is arranged), but he insists "acontece naturalmente" (it happens naturally).
Then comes the chorus, which is blunt to the point of being funny: "A gente bebe, transa e cada um vai pra sua casa" (we drink, sleep together, and each of us goes home). He sees "nenhum pecado" (no sin) in it, because "Não precisa ser namorado pra se amar loucamente" (you don't have to be boyfriend and girlfriend to love each other like crazy). The little "Tchau" (bye) after the chorus is the cheeky punchline.
For learners, it is full of everyday spoken Portuguese: a gente for "we", pra as the short form of para, né? (right?) tagged onto sentences, 'tá for está, and cara (dude). The diminutives amorzinho de baladinha (a little party romance) make the whole thing sound playful rather than serious.