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Used to describe any form of music that is being played so obnoxiously loud that one feels as though their ass is being pounded by every note.
"The asspounding beat coming from the car down street was loud enough to violate every orifice of my body in the most inappropriate ways."

"I could hear the faint asspounding beat coming from the teens headphones on the subway as I sat silently across from them wondering why anyone would listen to Justin Timberlake in the first place."
by Byron Cunningham February 07, 2008
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