What does this idiom mean: 'to blow in'?

[Sylphidae]

Happy new year!!!

Here is my first question for this year:

PARSONS:
Hey, buenos dias, cowboy. When d'you blow in?

What does the underlined phrase mean?

[Alan]

This means arrive unexpectedly.
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English as a Second Language
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[Sylphidae]

Is it a colloquial phrase? Can I use it in an informal conversation without implying sarcasm? I mean, is that phrase safe for everyday use?

[Alan]

It is used in conversation but is quite harmless. You would use it in a familiar way to a friend or someone you knew well.
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English as a Foreign Language
You can read my EFL story Word Story: Search Engines