Meaning

noun a shape that sags

verb droop, sink, or settle from or as if from pressure or loss of tautness

verb hang loosely or laxly

originInherited from Middle English droupen, from Old Norse drúpa (“to droop”), from Proto-Germanic *drūpaną, *drupōną (“to hang down, drip, drop”), from Proto-Indo-European *dʰrewb- (“to drip, drop”). Doublet of drip and drop.

Etymology from Wiktionary, CC BY-SA 3.0