prick(sth)up
—phrasal verbwithprickverb[T]uk/prɪk/us/prɪk/
When ananimalpricksitsearsup, or whenitsearsprickup, it putsitsearsupstraightbecause it islisteningcarefullyto asmallsoundor one that isfaraway.
（动物）竖起（耳朵）听
If youprickupyourears, or ifyourearsprickup, yousuddenlybegintolistenverycarefullybecause you haveheardsomethinginteresting.
（人）侧（耳）倾听
Ioverheardthemmentioningmynameandprickedup myears.我无意中听到他们提起我的名字后就竖起耳朵仔细听。