spur on

spur on idiom
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]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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