sometimes an insult, sometimes a compliment, u just never can tell, depends on how u use it in a sentance
Mike: im sorry jibbs, ur a jabroni, u own me
OR: a naive, inexperienced person
That's one of his jabronis over there.
What do ya think I am, some kind of jabroni or something?
2. an italian profanity used to describe and "asshole" or "jerk" when talking about a person
2. This jabroni was smarting off to me, so I kicked his ass.
2: Someone exhibiting reasoning ability as poor as that of Socrates.
Marcus: Indeed, that jabroni should be thrown to the lions!
Jabroni can also be used to describe moron's who suck a lot of dick.