Definition of 三角木馬 (さんかくもくば)
さんかくもくば
                        三角木馬
さんかくもくば
sankakumokuba
noun
•
        
ridged wooden bench used in SM practices (and in the Edo period for torturing female prisoners)
Related Kanji
| 三 | three | 
| 角 | angle, corner, square, horn, antlers | 
| 木 | tree, wood | 
| 馬 | horse |