It's short for "Bo's Bar and Automotive". (most forums I'm on, I have to use Bosbar) It's actually a joke. Now and then I"ll do a friend a favor and put brakes on their car, truck whatever and I would write in their maintenance log under "work performed by" Bo's Bar and Automotive. If they ever sell their vehicle and the person looks at the maintenance record they"ll have some explaining to do. (sick, sure but, that's just me. If you can't laugh at everybody else then who can you laugh at, or was that, if you can't laugh at yourself....?)