I need your help with English questions,thanks?

Question

Hi, I am reading a Sherlock Holms novel written by Doyle and Carr, and I have some questions.
1.A lady says: "Why do you think that a McRea of McRea would condescend to use such a cognomen as Cabpleasure, open as it is to comment from a primitive sense of humour?" Does it mean that Cabpleasure is an unworthy name for her?
2."Such airs as Mrs. Cabpleasure's (she is haughty and prides herself on having noble
ancesters) become a trifle ridiculous when worn at second-hand." What does "worn at second-hand" mean?
3 A milkman is being searched by the Scotland Yard detective rudely. And he cries out:" he ain't fit to be loose. He's off his blooming chump!" Does "he ain't fit to be loose" mean he is mad too?
4. What is a "female searcher"? Are they woman police?
Please kindly explain. Thanks in advance.

It's not what you guys think. I am a translator and I need to know every word's exact meaning to translate them into Chinese. It's not my homework. I am just asking for help with English idioms which I cannot understand or find a way to check them up.

Answer 1

1) Yes, she is some kind of nobility, and the name sounds common.

2) In this sense, it means when looked at by somebody else.

3) Yes, he should be locked up (in an asylum)

4) I don't know, without seeing the sentence it is being used in.

Answer 2

I know this is 'old' but the book is by Conan Doyle's son, Adrian, and John D. Carr. If you are translating this collection of short stories, who for as it is copyright material.

Answer 3

The teacher wants your opinion of the book and needs to know whether you understand the meanings behind it. Do your own homework. You won't learn anything from plagarism

Answer 4

maybe you should ask questions in class