"bench jockey." YourDictionary, n.d. Web. 24 June 2018. <http://www.yourdictionary.com/bench-jockey>.
bench jockey. (n.d.). Retrieved June 24th, 2018, from http://www.yourdictionary.com/bench-jockey
(plural bench jockeys)
As verbal jousting is frequently called "riding", the the "rider" sitting on a bench came to became known as the bench jockey.
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