The Up Against the Wall Motherfuckers (often referred to as simply "The Motherfuckers", or UAW/MF) was an anarchist affinity group based in New York City. This "street gang with analysis" was famous for its Lower East Side direct action and is said to have inspired members of the Weather Underground and the Yippies.
The Motherfuckers grew out of a Dada-influenced art group called Black Mask with some additional people involved with the anti-Vietnam War Angry Arts week, held in January 1967. Formed in 1966 by painter Ben Morea and the poet Dan Georgakas, Black Mask produced a broadside of the same name and declared that revolutionary art should be "an integral part of life, as in primitive society, and not an appendage to wealth." In May 1968, Black Mask changed its name and went underground. Their new name, Up Against the Wall Motherfuckers, came from a poem by Amiri Baraka. Abbie Hoffman characterized them as "the middle-class nightmare... an anti-media media phenomenon simply because their name could not be printed."
Valerie Solanas, a radical feminist and would-be assassin of Andy Warhol, was friends with Morea and associated with the Motherfuckers. In the film I Shot Andy Warhol, the gun used in her attack is alleged to have been taken from Morea.
When Morea was asked in a 2005 interview by John McMillian of the New York Press how he had been able to rationalize supporting Solanas, Morea replied, "Rationalize? I didn't rationalize anything. I loved Valerie and I loathed Andy Warhol, so that's all there was to it." He then added "I mean, I didn't want to shoot him." He then added: "Andy Warhol ruined art."