Parting shot 意為「回馬槍；臨別惡言；臨別時所說的尖酸話；臨別時所撂下的狠話」。這個用語可追溯到 1820 年代，但在此之前，它是指作戰單位在撤離作戰場地之前一齊發射的砲火。Parting shot 為可數名詞，複數為 parting shots，通常與 take、fire 或 deliver 等動詞連用，其後往往接介系詞 at，再接被惡言或狠話抨擊的對象。
例句：
- The minister announced his resignation on Monday, taking a parting shot at the president. (這位部長週一宣布辭職，臨走前來一記回馬槍，狠批總統一番)
- The departing coach has fired a parting shot at some government officials. (這位即將離職的教練臨別前酸言酸語批評一些政府官員)
- John delivered a parting shot in the interview, saying he would deal a serious blow to that guy. (約翰臨走前在訪問中撂下狠話，說他會給那個傢伙嚴重一擊)
- “And the bike that you bought me is also cheap trash!” was her parting shot. (「還有你買給我的那部腳踏車也是廉價的爛貨！」是她臨走時扔下的一句話)