to pull off something extremely difficult or seemingly impossible, often through ingenuity
A Lúcia dá nó em pingo d’água e conseguiu organizar tudo em uma tarde.
Lúcia can work miracles and managed to organize everything in one afternoon.
Tying a knot in a drop of water is physically impossible. The deliberately surreal image therefore praises someone resourceful enough to solve an extremely difficult problem or find a way through almost anything.
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