to deceive, to trick
Vous croyiez vraiment pouvoir me duper ?
Did you really think you could fool me?
— Insaisissables 2 (2016)
Sinon, comment aurais-je pu vous duper ?
Otherwise, how could I have fooled you?
— Full River Red (2023)
Comment oses-tu venir ici pour nous duper ?
How dare you come here and deceive us?
— Mysterious Object at Noon (2000)