Mr

Mr British EnglishBrE, Mr. American English /ˈmɪstə $ -ər/ W2

1 MANused before a man’s family name to be polite when you are speaking to him, writing to him, or talking about him 先生〔用于男子姓氏之前的礼貌称呼〕

Mr Smith is the headteacher.

史密斯先生是校长。

Mr. John Smith

约翰•史密斯先生

Mr and Mrs Smith

史密斯先生及夫人

2 MANused when speaking to a man in an official position 先生〔对有官职男子的称呼〕

Mr Chairman

主席先生

Mr. President

总统先生

→ madam(3)

3 Mr Right MARRYa man who would be the perfect husband for a particular woman 理想的丈夫，如意郎君

She’s finally found Mr Right.

她终于找到了如意郎君。

4. Mr Big informalSCCLEADER the leader or most important person in a group, especially a criminal group 〔尤指犯罪集团的〕头儿，老大

5. Mr Clean informalHONEST someone who is honest and always obeys the law 清白先生，诚实守法的人

6 Mr Sarcasm/Mr Messy/Mr Forgetful etc spokenCHARACTER/PERSONALITY used humorously to say that someone has a particular quality or behaves in a particular way 讽刺先生/邋遢先生/健忘先生等〔幽默用法，表示某人具有某种品质或行为方式〕

I don’t think we need any comments from Mr Sarcasm here.

我认为我们不再需要讽刺先生在这里发表更多高见了。

→ no more Mr Nice Guy! at guy(5)

From Longman Business Dictionary

Mr.Mr.

1a title used before a man’s family name when being polite

Please can I speak to Mr Shultz?

Mr. Rupert Murdoch

2a title used when addressing a man in an official position

May I speak, Mr Chairman?

Welcome home, Mr. President.

MRMRMARKETING