on the hop

phr

• ① 【口】忙碌的;活跃的
  • She has been on the hop all day.她整天忙碌。

• ② 【口】冷不防
  • keep a person on the hop使某人忙得团团转
  • The reporter caught her on the hop with that question.记者趁虚问了她那个问题。