Broad Brush (April 16, 1983 – May 15, 2009) was an American thoroughbred racehorse foaled in Maryland. He was by the Hall of Fame stallion Ack Ack out of the Hoist The Flag mare Hay Patcher. Bred and owned by and trained by Richard W. Small, Broad Brush won a number of stakes races at age two before being prepped for the 1986 Kentucky Derby.