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1. A leather strap looped under a horse's tail and attached to a harness or saddle to keep it from slipping forward.
2. The rump of a horse; the croup.
[Middle English crouper, from Old French cropiere, from croupe, rump; see croup2.]
1. (Horse Training, Riding & Manège) a strap from the back of a saddle that passes under the horse's tail to prevent the saddle from slipping forwards
2. (Horse Training, Riding & Manège) the part of the horse's rump behind the saddle
[C13: from Old French crupiere, from crupe croup2]
crup•per(ˈkrʌp ər, ˈkrʊp-)
1. a leather strap fastened to the saddle of a harness and looping under the tail of a horse to prevent the harness from slipping forward.
2. the rump or buttocks of a horse.