noun
circus equestrian-trick performer
A performer who does tricks on horseback in a circus. This is a specific historical or traditional role, not a general circus performer.
曲馬芸人が馬の背で逆立ちを披露した。
The circus equestrian-trick performer did a handstand on the horse's back.
Compound of 曲馬 (equestrian tricks) + 芸人 (performer). The exact historical derivation is uncertain, but the term is conventionally associated with traditional circus equestrian acts.