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(Bee-lin-berg: When two men give each other double reach arounds while a third guy is taking turns licking each of their asses until the first one cumms. Usually this involves human and animal feces smeared around the genital areas.

"Hey Johnny, didn't you say you and the fellas had a bielenburg last night? That shit is just nasty!!!"
by TrentR3Znar July 20, 2007
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