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Abdominal reins is the excessively large, cheesy and sexy flab of fat that exist on the side of BBW women. In extreme cases it hangs over the side of their jeans and plays peek a boo as her shirt sways with the wind.
EX: While my ole lady and I were having intercourse, I latched on to her abdominal reins and rode her into town....YEEEEHAWWW
by Fire Sauce July 08, 2014
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