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flappy

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WordReference Random House Unabridged Dictionary of American English © 2025

flap•py adj., -pi•er, -pi•est.

slack or loose, so as to flap readily.

1900–05; flap + -y¹; probably re-formation and not continuous with obsolete flappy flabby

'flappy' also found in these entries (note: many are not synonyms or translations):

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