buckjumper

buck·jump

 (bŭk′jŭmp′)
intr.v. buck·jumped, buck·jump·ing, buck·jumps
1. To buck, as a horse or mule does.
2. To move in sudden jerks; lurch.

buck′jump·er n.

buckjumper

(ˈbʌkˌdʒʌmpə)
n
(Horse Training, Riding & Manège) Austral an untamed horse
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References in periodicals archive ?
* 'The Buckjumper' -- Ernie Pope, Roma, Queensland, 1932 (music & lyrics).
Tell any amount of crammers about buckjumpers, mountain bulls, and flyers.
The stock teams also push each other into signing up for things that only the most intense peer pressure would ever persuade anyone sane to do: riding the 'buckjumpers' or the 'bronco bulls'.