on the hoof
臨時(shí)或即興進(jìn)行的，未經(jīng)策劃的
口語·描述臨時(shí)或即興決定
英文釋義
improvised or done quickly; without careful planning or preparation
例句
We decided on the hoof to take a detour and visit the beach instead.
典故來源
源自畜牧業(yè)，指牲畜未屠宰時(shí)活著的狀態(tài)，后比喻未經(jīng)準(zhǔn)備或臨時(shí)決定。