Flower power is an old-fashioned way of referring to hippies and the culture associated with hippies in the late 1960s and early 1970s.
...the era of flower power.
...the flower power generation.
flower power in British English
noun
informal
a youth cult of the late 1960s advocating peace and love, using the flower as a symbol; associated with drug-taking. Its adherents were known as flower children or flower people
Examples of 'flower power' in a sentence
flower power
Is flower power the way forward?
Times, Sunday Times (2007)
It's the only way to wear flower power this season.