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.

A delicious jam made from Blackberries

When 3 or more people are in a meeting, not talking to each other, but are all checking, emailing or talking on their blackberries.

When a black man splooges on a (typically white) female, and she uses the fluids for spreading on toast