bareback
adj. C1 Advanced UK //bˈeəbæk// bare·back
adj. riding a horse without a saddle. It can also describe having sex without using a condom.
adj. riding a horse without a saddle; by extension, engaging in sexual intercourse without the use of a condom. Often used in informal or specific subcultural contexts.
He prefers to ride bareback because it feels more natural.
The cowboy spent the afternoon riding bareback across the plains to check on the cattle.
While some riders find the direct contact of bareback riding more intuitive, it requires a high degree of physical coordination and a deep understanding of the horse's movements.
From bare + back.