Josing can be defined as the following:
1. Serving time in jail or prison.
2. Participating in an activity or distraction, particularly in jail, which makes the time seem to pass faster.
3. The act of joking at someone else's expense, especially in jail but also used in street context.
"My boy been josing for 3 years off a gun charge."
"Man if we could smoke in the parish jail we'd be straight josing."
"We was straight up josing off that boy all day - he got drove as fuck."