1. A revolver. 2. An escape. 3. A pursuit by the police; an interruption of a criminal act."We got a blow on that Jersy heist (holdup) but lammed (escaped) before the law got there." 4. Cocaine.

1. To move on; to flee; to escape from the scene of a crime or from prison; to jump bail, parole, or probation. 2. To blast with explosives, as a safe. 3. To lose; to bungle. "Don't blow that piece (revolver); it cost me a double sawbuck (twenty dollars)."

- american underworld dictionary - 1950