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generally found on extremly fat people, its a huge sagging boob, or a belly roll or rolls and other things that fit in this description above. when whalelike people walk around, these items apear to (flap), due to air resistance and gravity, much as a birds wings flap or a whale flipper flip and/or flap. sometimes these things all flap/flip at once. this could be called a fat man's disco. amazingly, u get all this action just from walking!
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