(adjective)
(less common spelling of "hippie") relating to the subculture that gained popularity in the 1960s, characterized by the rejection of traditional/established values of society;
e.g. All of them lived together at a camp and followed a hippy lifestyle of being close to nature.
(noun)
(less common spelling of "hippie") a person belonging to the subculture that gained popularity in 1960s, typically having long hair and/or an unconventional appearance or dressing style and characterized by a rejection of the established values of traditional society;
e.g. They saw a hippy walking around barefoot, wearing flowy clothes.