Referring to a jabroni or jabrone who has done something actually cool, however it is often an accident. The root of the word being "bron" as in "Lebron James" combined with the word jabroni.
Stewart catches an edge snowboarding right before going off a jump and lands a flip.
"Nice job Stew, you jabron you"
Timmy picks up goldschlager cuz he's a pussy. The hot chick at the party only drinks goldschlager.
"Nice job Timmy, you lucky Jabron"