Although the term yuppies had not appeared until the early 1980s, there was discussion about young urban professionals as early as 1968.

Critics believe that the demand for “instant executives” has led some young climbers to confuse change with growth. One New York consultant comments, “Many executives in their 20s and 30s have been so busy job-hopping that they’ve never developed their skills. They’re apt to suffer a sudden loss of career impetus and go into a power stall.”
-Kessler, Felix. “Executive Promotion Path: Fast Track for Young Managers”. Management Review 57 (3): 25.

anyway… Die yuppie scum!