You say this when someone in an argument scores a hit on you — makes a point so good, or so neatly turns your own words back on you, that you have to admit it. It is a small, sporting surrender: not "you win the whole argument", just "that one landed". Said with a smile, usually, and often with a little laugh, because admitting it is part of the fun.

when someone in an argument當吵架或辯論中有人 scores a hit on you點中了你的要害 — makes a point so good他講出一個很棒的論點, or或者 so neatly turns your own words back on you把你自己的話漂亮地反過來用在你身上, that you have to admit it讓你不得不承認 — You say this你就會說這句話。It is a small, sporting surrender這是一種小小的、有風度的認輸: not "you win the whole argument"不是「你贏了整場辯論」, just "that one landed"只是「這一招你打中了」。Said with a smile通常會帶著微笑說, usually, and而且 often with a little laugh常常還會笑一下, because因為 admitting it承認這一點 is part of the fun本身就是一種樂趣。

It comes from fencing, where you call out that your opponent's blade has touched you, and English keeps the French sound: roughly "too-SHAY".

It comes from fencing這個字來自擊劍運動, where在那裡 you call out你會喊出聲 that your opponent's blade has touched you表示對手的劍碰到你了, and而 English keeps the French sound英文保留了法文的發音: roughly大概唸成 "too-SHAY"「too-SHAY」。

Common in speech among educated speakers of all ages, and in writing only in dialogue or something chatty. You can also use it about a third person — "Touché to her" — but the plain one-word reply is by far the usual thing.

Common in speech在口語中很常見 among educated speakers of all ages各年齡層受過教育的人都會說, and而在 in writing書面文字裡 only in dialogue or something chatty只出現在對話或比較口語的內容裡。You can also use it about a third person你也可以用它來講第三個人 — "Touché to her"「Touché to her」（她這句厲害） — but不過 the plain one-word reply單獨這一個字的回答 is by far the usual thing才是最常見的用法。

Because it admits a hit, saying it makes you look good-humoured and confident, not defeated.

Because it admits a hit因為它承認自己被說中了, saying it說這句話 makes you look good-humoured and confident會讓你顯得幽默、有自信, not defeated而不是顯得吃了敗仗。