What is Jam-dossin?
1.
Hanging around, relaxing in a somewhere.
Used mainly by children and teenagers, and sometimes by young adults.
It is a mixture of Jammin and dossin, which both mean to hang around or relax/chill in a certain place. Although dossin is usually associated with slacking off, e.g. "the youths were dossin outside the shops".
Dave - "Hey Ricky! What ya doin man?"
Ricky - "Im just jam-dossin blud!"
See