A
combination of the words "bad" and "uno" signifying a regrettable hookup, a mistake, not limited to looks or
personality, but can also be attributed to circumstance. the word is sometimes also spelled "boono" at times when the buno is so bad that you
just have to be booed and hope that nobody hits you with a head of rotting cabbage
I hooked up with a hot mom once, but her husband came home and chased me
out of the house with a golf club. That was
definitely a buno.
I should have worn a condom. I'm gonna have a constant
reminder of that buno every couple of months.