Denotes a convertible automobile; commonly used in automotive and slang contexts.
He cruised down the boulevard in his brand-new drop-top.
Il a roulé le long du boulevard dans son cabriolet tout neuf.
He cruised down the boulevard in his brand-new drop-top.
Il a roulé le long du boulevard dans sa décapotable toute neuve.
Attributive use describing something (usually a car) that has a roof that can be folded down or removed.
They rented a drop-top sports car for their coastal road trip.
Ils ont loué une voiture de sport décapotable pour leur road trip sur la côte.