Yippie usually refers to members of the Youth International Party, a radical counter-culture group founded in 1968.

1. The dog kept yipping at the door all night.
   那只狗整晚在門口不停地尖叫。
2. She started yipping nervously when she realized she was late for the meeting.
   她意識(shí)到自己遲到了會(huì)議后，緊張地開始尖叫。