馬の骨 うまのほね Meanings Expression, Noun person of doubtful origin (often どこの〜) Kanji 馬 horse. Read as うま. 骨 bone. Read as ほね. Example sentences こいつはどこの馬の骨だ?Who's this nobody? Words containing 馬の骨 どこの馬の骨 (どこのうまのほね) person of doubtful origin Jinuma: Japanese Dictionary · Word lists