What is Jb Out?
1.
i. to give an excuse so that you are not forced to leave your room and enter the outside world.
ii. to claim that you can't go do an activity, like a pussy
synonomous with "bitch out"
Justin decided to JB out of going to the Mariner's event so that he could play HALO and jerk it to Tobey Maguire.
See 
Random Words:
1. 
A movie that is so shite that you would only see it on a date with someone in the hope of having sex with them afterwards.
Girl: "..