sunshine boy

Sure . . . i would just say that you want to be careful that it doesn't sound sarcastic. It would be an acceptable term to describe someone with a positive attitude.

I suppose so, but you may want to reflect on the fact that "The Sunshine Boy" is a documentary film about a mother and her autistic son, and that many hearers/readers of your phrase may therefore get a different meaning from the one you intend.

In any case, even ignoring the above, the phrase "sunshine boy" suggests -- to me -- a child or male adult in a perpetual state of optimistic bliss, a kind of male Pollyanna, who is possibly somewhat "special" in some way. Eg Down's Syndrome, autism, etc.

"John is a sunshine boy" makes no sense.

"John has a sunny attitude" is better.

It is perfectly good colloquial English. It suggests a boy whose demeanour always reminds one of sunshine, that is, a cheerful happy boy.

It may be significant to note that calling a male "sunshine" can have a homosexual connotation.

horsie poop

That's interesting, sunshine.

I would have no idea what would be meant by "sunshine boy" if I heard it, so I disagree with the majority here. It could mean he likes being outside in the sun, for all that matters. To me, it's an obscure phrase.

I agree with those saying that "sunshine boy" would have somewhat negative conotations like that of a "male Pollyanna." I wouldn't use this particular expression.

In my city, back in the day.. A local paper used to have a daily 'sunshine boy and girl" in the paper. Akin to the pinup girl in the London Sun.

Well I don't believe that sunshine boy would be the correct word to use and here is why: the definition of a sunshine boy by the urban dictionary is "The kind of all singing-all dancing guy who appears to be loving, caring and seems to be nothing but perfect, ends up stealing your girlfriend just so he could fuck her. They stay together for how ever long sunshine-boy can stay perfect. Which isnt usually very long." So this wouldn't be a possitive description of someone.