A member of a group of politically active hippies, originally in the US.
- ‘The hippies and yahoos and yippies and SDS students were seen as a real threat to the fabric of society.’
- ‘No US promoter had put on a hippie / yippie show of its scale, bringing together the most popular bands around, tattoo tents and Gyro stands.’
- ‘Holly screamed with delight and Molly let out a yippie.’
- ‘I remember when thousand of hippies and yippies surrounded the Pentagon during the Vietnam War and held an exorcism to drive out the evil demons.’
1960s: acronym from Youth International Party + the suffix -ie, on the pattern of hippie.