1. (also scram out) to escape, to run off.
2. as imper. scram!
[mid-19C] (UK Und.) of a tramp, taking a job of work, then quickly moving on.
[1950s–60s] desertion, the act of running off.
[1930s] (US) to disappear, to run off.
[1940s] (US Und.) to run off.