"On the lam" or "on the run" often refers to fugitives. The Thesaurus of American Slang proclaim that lam, lamister, and "on the lam" — all referring to a hasty departure — were common in thieves' slang before the turn of the twentieth century. A "lamister", or, "lamster," is a slang term for fugitive.
by antkneep June 28, 2011
by Marcus November 23, 2004
To be running away from the authorities. This term dates back to the 1920's and was a part of urban slang.
"I pinched the hooch from some drugstore cowboy of a raggle-muffin and now im on the lam so you better scram or ill knock you off. Kepeesh!"
by Brian R. Turner September 26, 2006
by jjp54 February 03, 2010