fleeting, short-lived, temporary
E se não for passageira, caro senhor?
And what if she isn’t just a passing thing, sir?
— Oito e Meio (1963)
Eles não querem admitir que é realmente uma moda passageira.
They don’t want to admit that it’s really just a passing fad.
Ficou bem claro que era só curiosidade passageira.
It became quite clear that it was just a passing curiosity.
Manter sua paixão passageira, de homem velho.
To maintain his fleeting passion, like an old man.
— Viver (1952)
It's just a passing attraction.
— Moulin Rouge: Amor em Vermelho (2001)
It's just a phase.