bareback
adjective, adverb uk/ˈbeə.bæk/ us/ˈber.bæk/
(ON HORSE) 无马鞍的(地)without a saddle on the back of a horse that is being ridden
a bareback rider 不用马鞍的骑手
Is it difficult riding bareback? 不用马鞍骑马很难吗?
(SEX) slang不使用避孕套性交 (of sexual activity) performed without using a condom