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The act of a man thrusting his hips in a fore to aft motion, resulting in his penis slapping the front of his garments; a thin, non-restricting garment is preferred, such as boxers or basketball shorts. A bigger package along with the perfection of the hip thrust movement results in a more effective and visually impressive dong flong.
Cody's parents visited him last weekend and came over for dinner. Whilst they were enjoying a nice, candlelit meal, I came running into the living room and asserted my alpha-male status of the apartment by doing a thirty second dong flong in silk boxers.
by NFG Dong Flong January 28, 2014
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