époustoufler signifie anglais

stun [stunned, stunning, stuns]▼◼◼◼(to shock or surprise)
verb
[UK: stʌn] [US: ˈstən]

flabbergast [flabbergasted, flabbergasting, flabbergasts]▼◼◼◻(to overwhelm with bewilderment)
verb
[UK: ˈflæ.bə.ɡɑːst] [US: ˈflæ.bər.ˌɡæst]

blow someone's mind▼(to astonish)
verb