Hoff ‧ man, A ‧ bbie /ˈhɒfmən $ ˈhɑːf-, ˈeɪbi/ BrE AmE
(1936–89) a US political ↑ activist (=someone who works to achieve social or political change) . In the 1960s, he was the leader of the Youth International Party in the US, an organization that was also referred to as the Yippie movement.