* A misspelling: Perhaps you meant "beauteous" (meaning beautiful) or another similar word.
* A neologism: A newly coined word. Someone might have made it up, but it hasn't gained widespread use.
* A term specific to a certain community or context: It could be a term used within a particular online community, hobby group, or geographical region.
* A name: It could be a name.
Without more context, it's hard to say for sure.