A people traffic jam that occurrs in subway tunnels and bus stations. Caused by inconsiderate workaholics walking too slow while their noses are glued to their Blackberry device.
I was late for work because there was a Blackberry Jam getting out of the A train.
by bratina August 30, 2005
A delicious jam made from Blackberries
Today I had blackberry jam on toast.
by missleah97 January 13, 2012