Transplante literally means "transplant" in English. It's a striking and somewhat unexpected word to find in a pop song, making it memorable and intriguing.
In the context of Marília Mendonça's song, the singer declares that for her ex to truly forget her, they would need a "heart transplant" ("Pra me esquecer, vai precisar de um transplante"). This hyperbolic and dramatic use of the word emphasizes the depth of her impact and the impossibility of moving on without a complete emotional overhaul, making it a powerful and enticing word choice.
This is a sertanejo classic about pride mixing with heartbreak. The singer runs into an ex and, instead of admitting they still miss them, goes on the offensive: asking sarcastically how the ex is doing now, who helped them home from their first night out, and who's sharing their bed and their earbuds.
But the real confession comes in the chorus. Underneath the jabs, the singer's own heart is the problem: it's stubborn, it won't listen, and it still only wants the person it's supposed to be over. Forgetting them, the song jokes, would take nothing less than a full heart transplant.
It's a song about how the head can move on faster than the heart, and about using humor and a bit of attitude to cover up how much it still hurts.