忽上忽下 hūshànghūxià to go up and down Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 有一只蝴蝶正在花丛里忽上忽下地飞着。 yǒu yī zhī húdié zhèngzài huācóng li hūshànghūxià de fēi zhe. A butterfly is flying up and down among the flowers. Source: UM-Corpus: Spoken