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em um piscar de olhos angolul

PortugálAngol
em um piscar de olhos preposition

at the drop of a hat(instantly, without hesitation)
preposition
[UK: ət ðə drɒp əv ə hæt] [US: ət ðə ˈdrɑːp əv ə ˈhæt]

in the blink of an eye(immediately, instantaneously)
preposition