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.