お馬うまさんMeanings1nounhorse; horsiefamiliar languageAffectionate, child-friendly term for a horse. Often used by or to children, or in a playful, familiar tone.公こう園えんでお馬うまさんに乗のったよ。I rode a horsie at the park.お馬うまさん、かわいいね。The horsie is cute, isn't it?