Idiom: 'happy go lucky'

[mishy]

What does boy next door and easy go lucky mean?

[Mister Micawber]

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The boy next door is a typical boy.

Easy go lucky is-- I guess-- a variation of happy go lucky, which means easy-going; relaxed, non-ambitious; one who enjoys being Here Now.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber