Also spelled "bhup" or "bup".
A word stated entirely on its own to express uncertainty, unconcern, indifference, or apathy; is usually said on its own as an expression in place of "I don't know" or "Doesn't Matter"
Jane: What time's the football game start, John?
Joe: Faaaack man tonight's gonna blow man....
Fornication between two individuals that comes as a surprise to those that find out.
Wow, can you believe Joe and Jane buhped last night?!?
You're not gonna believe this but Kate and I buhped last night.