A social gathering in which many people are openly banging and or having sex. eg. orgy, smash party, slam-sesh, fuck fest.
TBlaster: "Yo JJanz, tonight were all gettin hamboned and all those DG's (dirty girls) are commin over and were havin a slam party."

JJanz: "Sweet Bra!"
by TBlaster July 19, 2011
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