Meaning of Spanish word "paisa" Colombia slang?

I've come across the word "paisa" and am not sure what it means. I saw it used to describe someone, specifically it was Juanes, they said he's paisa or is a paisa....not sure can any NATIVE speakers help me? I've already tried to find it online with no success.
Update: gracias todos...i and also ....its a good term right?
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