slipknot: a knot at the end of a cord or rope that can slip along the cord or rope around which it is made
knot: any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object
flower people: a youth subculture (mostly from the middle class) originating in San Francisco in the 1960s; advocated universal love and peace and communes and long hair and soft drugs; favored acid rock and progressive rock music