ニコニコ動画 June 18, 2009

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IDIOMS!
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1) cold-blooded killing: the killing of st with no regret or remorse.
冷酷｛れいこく｝な殺人

2) a no-fly zone: an area where planes are NOT allowed to fly
上空｛じょうくう｝の飛行禁止区域｛ひこう きんし くいき｝

3) to pile on st: to add a lot of things on something
積み重ねる

4) a zinger: a witty often sarcastic or mean comment
〈話〉当意即妙｛とうい そくみょう｝の受け答え、気の利いた発言

5) to bug sb: to put a secret listening device in a room to spy on somebody
～に盗聴用｛とうちょう よう｝マイクを付ける、盗聴｛とうちょう｝する

6) I'd like to be a fly on the wall for that.=I wish I could be there when that happens.
Example:
I wish I had been a fly on the wall last night when Joe and Sally broke up.
昨夜JoeとSallyが別れるところを、こっそり見たかった。