* It's a misspelling: It could be a misspelling of another word with a similar pronunciation. For example, "harban" or "harba" could be possible options.
* It's a regional or dialectal word: It might be a word used in a specific region or dialect of Punjabi, not widely known outside that area.
* It's a made-up word: It could be a made-up word with no specific meaning, perhaps used in a specific context or for a particular purpose.
To understand the intended meaning, you need more context. Please provide the sentence or situation where you encountered the word "harbaan".