A Drunken Pussy Circus is a get-together, usually at someone's house, where guys will invite easy girls and sluts with the intention of getting them drunk. Then the guys get them to do dumb stuff like take off their clothes, kiss each other, and engage in sexual activites with them. This term also includes meetings where people just want to drink, smoke, and have random sexual relations because they have nothing better to do. A girl who gets invited to a DPC is know as a Drunken Pussy Cunt (also, a DPC).
Last night John's house was one wild Drunken Pussy Circus (DPC), it was off the hook!