chasing tail
追求不切实际或无法获得的目标
口语·贬义，形容轻浮的恋爱行为
英文释义
to pursue or pursue multiple romantic or sexual partners, often in a casual or noncommittal manner
例句
He's always chasing tail at parties instead of making real connections.
典故来源
源于狗追逐尾巴的意象，引申为随意追逐异性或短暂浪漫关系。