Generic candy, usually caramel peanut turtles, thin mints, etc. that a young kid sells you under the pretext of raising money for his band but is really being peddled by a gang, using the kid as a shill.
This is never high-quality candy and has usually been sitting in a warehouse for some extended period of time.
Dear Abby, is it okay to re-gift the gang candy I bought the other day?
I got stopped at the top of the Metro the other day and ended up buying two boxes of gang candy. FML.