sidewalk alumni
n.pl.— «He was talking in somewhat awed tones of the game he had seen the day before at the Polo Grounds—the one between the New York Giants and the Chicago Bears.…As one of the sidewalk alumni who was sitting just behind where we were sitting said, “That’s the best ‘gool’ line stand I ever saw.”» —“With Malice Toward None” by W.J. Lee Hartford Courant (Connecticut) Oct. 25, 1939. (source: Double-Tongued Dictionary)