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Use "riff-raff" in a sentence
"Fourth Cavalry on its way to the Philippines, as many drunken man-of-war's men, divers ladies from Iwilei, and half the riff-raff of the beach."
"At half a mile distant the battleship blew up — simply blew up, that was all, her shattered frame sinking to the bottom of the bay, a riff-raff of wreckage and a few survivors strewing the surface."
"Then came a mountain storm that blew a blizzard across the riff-raff of high and shallow divides."