traffic stopper

Translations
что-то, что привлекает внимание
Her dress was a real traffic stopper at the party.
Ее платье привлекло всеобщее внимание на вечеринке.
Definitions
A person, object, or event that attracts so much attention that it causes people to stop what they are doing, often literally stopping traffic to look. It can refer to something exceptionally striking, impressive, or unusual.