A young american with shit drop luck, can be used to describe a bad trip, or in certain occasions someone who is easily upset and offended.
"That trip to the shops was broncoz there was no semi skimmed milk left"
"Sort your life out son and stop doing a broncoz"
A recently founded word describing a total asshole, so much of a asshole he never shuts the fuck up about himself and everything he does say is complete bull shit. Also This person can be a emo or chav.
Scoots: Man he is one fucking broncoz, if he doesnt shut the fuck up im going to kill myself.
Chris: You fucking said it dude, im going to kill myself too soon.