Estimação is a fascinating word that most commonly translates to "pet" when used in phrases like "animal de estimação". However, it comes from the verb "estimar," meaning to estimate, value, or cherish.
In this song, Jorge Ben Jor uses it in a unique way: "Um piano de estimação" (a cherished piano). This gives the piano a personal, almost living quality, highlighting its importance to the singer and the samba. It's a beautiful way to express deep affection for an inanimate object.
Jorge Ben Jor recorded "Vem, Morena, Vem" for his 1963 debut album, Samba Esquema Novo, and the song is exactly what its title says: an invitation to dance. He sings "Vem morena vem sambar" ("Come, morena, come samba"), then lists what's waiting for her at his place — "Um piano de estimação" ("A cherished piano"), "Uma velha bateria" ("An old drum kit"), and "O meu violão" ("My acoustic guitar"). The instruments are ready; only she is missing.
That's the whole stakes of the song. He warns her plainly, "Sem você não vai haver samba" ("Without you there won't be samba") — no samba without her — and pleads "Não seja assim tão má" ("Don't be so mean"). It's a simple, joyful setup: a room full of instruments, a host who can't start the party alone, and one line repeated until she gives in.