I'm all right Jack

[Itasan]

'I'm all right Jack'
1. Is this BrE?
2. Is it nearly the same as 'happy-go-lucky Jack'?
3. Could this 'Jack' be any other name like 'I'm all right
Itasan'?
4. What is the American equivalent?
Thank you.

[Tdol]

It's BrE. It means that I'm alright, so I couldn't care less about other people. No, you can't change the name. I'm not sure of the origin, but there was a Peter Sellers film with this as the title.

[Itasan]

Thank you very much, tdol.
>>I couldn't care less about other people.<<
This kind of negative sentence is very difficult for
a NNES, at least for me. Does it mean?
1. I care about other people as well.
2. I don't care about other people very much.
3. I'm happy, so I don't understand the feelings
of those who are unhappy.

[Tdol]

It's selfish. I get a pay rise- other people don't. I'm alright, Jack.