When someone or something goes against what you want to happen or achieve; so you make fun of them behind their back with a word they don't know >:3
Brandon: You hear about Debra giving Matt a BJ on the steps
Greg: I know She's super BUNS, dude
In Barbados the term is used to say you will ignore or cut someone off from your life.
If you don’t stop that I will bun you.
What she said was dumb now she is on bun.
Bun
The guy who claims he want to be my friend, but hurt me like nobody's business
and then spend on everybody until he goes broke, but i am still homeless
The last man I have ever talked to, while I still had my trust
Homeless by public: hey, can you call Bun?
Everybody else: who?
Homeless by public: The guy who everybody make use of, while they exclaim about how broke he is going