This is the song I've been learning lately. Joao Gilberto's version of it. Here it's the composer singing (the younger guy). I don't play it very smoothly and I have a tendency to cuss when I mess up, so I wonder how the kids think the song really goes.
"Quando toca um samb-, quando toca um sa-, *&^1! quando toca um samba, e eu lhe tiro pra dancar..."