ester Young was jazz music’s first hipster. He performed onstage in sunglasses and coined and popularized the enigmatic slang “that’s cool” and “you dig?” He was a snazzy dresser who always wore a suit and his trademark porkpie hat. He influenced everyone from B. B. King to Stan Getz to Allen Ginsberg. When he died, he was the subject of musical tributes by Charles Mingus (“Goodbye Pork Pie Hat”) and Wayne Shorter (“Lester Left Town”), and incidents from his life were featured in the movie ‘Round Midnight.