'The phrase, “2 Girls 1 Cup,” refers to the trailer for the Brazilian fetish film Hungry Bitches made by MFX Media in 2007. The extreme fetishistic nature of the clip as well as the dramatic piano music playing in the background caused it to go viral in late 2007, with many internet users posting their own or others’ reactions to seeing the video for the first time. This phenomenon received significant attention from the media. As a result, 2girls1cup.com, hosting the most viewed mirror of the trailer, would become one of the most famous shock sites in internet history. The name, “2 Girls 1 Cup” has also been subject to parody, exemplified in shock sites such as 3Guys1Hammer.'

see clip here