Top Definition
A crowded house party wherein trap music is played at high volume and there is unlimited alcohol.
I got the keg and the trap bangers lined up for Friday night - it's gonna be bangfest!
by FreeThrowZP October 29, 2013
The act of group sex amongst acquaintances, traditionally initiated at a dinner party.
The girls have confirm for dinner this Thursday - bangfest!
by George_P September 01, 2012

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