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spur someone on
to urge someone onward; to egg someone on. (Fig. on applying spurs to a horse.) The crowd spurred the runners on throughout the race. The cheering spurred on the runners.
Goad or urge ahead, as in The thought of winning a Pulitzer Prize spurred the reporter on. This expression transfers using spurs to make a horse go faster to incentives of other kinds. [Late 1500s]
1. To urge some horse onward by the use of spurs: The knight spurred the horse on across the shallow river. I spurred on the horse as fast as it could go.
2. To stimulate or encourage someone or something: Low gas prices spurred on the booming economy. We never could have finished the project if our boss hadn't spurred us on.