Yippie

Noun

 * 1) A member of the Youth International Party, a group of politically active hippies.
 * 2)  A person who straddles yuppie and hippie mentality or lifestyle.
 * 3) * 2007 April 22, Roland White, “You're not going out like that!”, in The Sunday Times:
 * But there are also yippies, who are hippies with a touch of yuppie.

Interjection
yippie yippie yippie