* It's a misspelling of a different word: Perhaps you meant "Prussian," referring to something related to Prussia (a former kingdom in Europe).
* It's a regional term: It might be a local dialect word or slang in a particular area.
* It's a made-up word: If it's part of a fictional story or context, the author might have invented it.
To help me understand what you mean by "Pruse," please provide more context:
* Where did you encounter this word? (In a book, conversation, online, etc.)
* What was the surrounding text?
* What was the intended meaning?
With more information, I can give you a more accurate answer.