crupper

The huntsman who had been quarrelling came riding out of the bushes with the fox on the crupper, and rode towards his young master.

殴斗的在马鞍后面的狐狸也从林缘后面驰至少爷跟前来了。

Chela hoof of the horse toes step on in disorder before him, place turned 360 degrees circle, his headgear also was bumped to fly by the crupper on the side.

马的前脚蹄子就在他面前乱蹬，原地转了360度的圈，他的头套也被旁边的马屁股撞飞了。