A fork of Rural Dictionary
If you are being a Jobo, it is likely that you are being cocky or arrogant in a multiplayer videogame. This ranges from assuming only your teammates are at fault to generally acting like a 'know-it-all'. Being a Jobo isn't necessarily something to be ashamed of, but merely depicts a type of player that many gamers find annoying to deal with.
"This guy in my Overwatch game was so annoying to play with. He was skilled, but turned into a real Jobo when we started losing."