1. A marijuana cigarette.
2. One who is of such that chillness that the term bro does not do him/her justice.
1. To act in a manner characteristic of a jibrone.
2. To relax and/or chill with one's fellow jibrones.
Matt: "Steve is such a bro."
Jess: "Steve is beyond bro. He's a total jibrone."
"Lets post up next to the Book Mobile and just jibrone."
"Me, Jess and Matt were just watching "Emeril Live" and eating ice cream. Hardcore jibronin'.