[医]back swing ;
例句:
He caught hold of my coat-tails and pulled me down by main force.
他抓住我的上衣后摆,用力把我拽倒.
Your coat tails are fire, sir.
您那外套的后摆着火了, 先生.
The back of your shirt has worked out of your trousers.
你衬衫的后摆已经抻到裤子外边来了.