こんな時英語でどう言うの〜？英会話辞典 ：　

「さ」

さあ　：　Hmmm.   
最悪　：　The worst !  
最高　：　The best.  The highest.   Maximum.   
最後の手段　：　The last chance.   
再婚する　：　Remarry.  
幸先がよい　：　A good sign.  
冴えているな！　：　You're really sharp today.   
さえる　：　Bright.   Skillful.   
魚にしてやろう　：　Let's make fun of someone !   
先払い　：　Pay in advance.   
先細り　：　Someone is declining.   Someone is going down.   
探ってきてよ　：　Go feel (the situation, etc.).    
さくらなんじゃない〜？　：　They're just decoys, aren't they ?   
雑魚寝する　：　Sleep like sardines.   
差し上げます　：　Present someone with.   Like someone to have.   
差し当たり　：　For the moment.   
さじ加減　：　Ajust to circumstances.   
差し支えありません　：　No problem.  
差し支えなければ　：　If it's no problem.   
差し向かいで　：　Face to face.   
些少ですが　：　It's nothing much, but...   
さじを投げる　：　Give up.  
さすがですね〜！　：　As expected !   I knew it !  
...させる　：　Make someone do something.   Let someone do something.   
  　           Have someone do something.   
誘う　：　Invite someone (to see a movie, etc.)   Get someone to go with.   
雑音　：　Racket.   Static.  
ざっくばらんな　：　Straight-talking.   
さっと　：　Suddenly.   
ざっと　：　Roughly.   Briefly.   
ざっと話す　：　Give a rough outline.   
ざっと目を通す　：　Glance over.   Skim through brief.   
さて、　：　Well...   
里帰り　：　Going back to visit one's own parents.   
さばを読む　：　Cheating on the figures.   Fixing the books.   
さびしい　：　Sad.   Lonely.    
さびれる　：　become shabby.   
サボるなよ！　：　Don't play hooky.   Don't cop out !   
ざまあみろ！　：　Someone deserves it !   
さまになっていない　：　Something doesn't look right.  
さようでございます　：　Indeed, you are correct.   
騒ぎ　：　Commotion.   Trouble.     
騒ぎを大きくする　：　Add to the trouble.  
騒ぐ　：　Get excited.   Get upset.   Have a fit.   
差をつけられた　：　Someone made me look bad.   
残業する　：　Work overtime.   
参考までに　：　For Your information.   (FYI)    
残念ですね　：　That's too bad.   
残念ですがそれは出来ません　：　I'm afraid that's impossible.   

このコーナーは「講談社文庫」の「こんな時どう言う英会話辞典」（長村キット著）
から抜粋させて頂きました。
この本には役に立つフレーズが満載です。読み物としても面白いですよ〜！