Orifice Puckering Compound marketed and sold under the name OPC. A powdery compound created from grape seed extract and pushed by network marketers and MLM companies that promises to be a cure-all and sold for an inflated price.
I bought this crap from my brother called OPC. When he told me the price, my asshole puckered up tight as a drum. That shit should be called Orifice Puckering Compound, not OPC!