Someone that looks like Tarzan and fights like Jane.
Someone who sets themselves up to be embarassed.
As in someone asking if another person if they they pulled their pants down back there, and to the Jabroni you say, no I pulled your wife's pants back down there, and then I went down there.
....or, someone saying to you "You and I have nothing in common" to which you respond to the Jabroni by saying "We both have something in common because we've both had sex with your wife".
Terry 'Hulk' Hogan, and Dwayne 'The Rock' Johnson, famously use this word, at home, and during working for the WWE.
(Jabrone for short)
"Hey Linda, your Jabrone of a dog, took a turd on my weight machine"
Jude Law is the opposite of a jabroni, because he is legit.
the hobo on the side of the street is a jabroni because he always kicks my tires when I stop at the light.
2. One who continuously creates havocs on the road due to making more than 2 attempts at parallel parking, running a stop sign, going 20 in a 30 mph zone.
3. Generally...an idiot.
2. Did you see that jabroni? s/he rolled through the stop sign and didn't wait their turn.