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The act of rolling down a steep grassy hill, often in long johns. Usually done with two or more people. Sometimes results in feelings of euphoria and togetherness. Often an addictive act. Most people hill roll once a week to just feel normal.

Hill Rolling is also known as the HRing, or HR.
Dude, we were hill rolling at Doloras Park and I total fell in love with him.

Tonight we are going to HR and we will HR for life, man!
by HR4Life July 20, 2011
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