dated slang To give up illegal or illicit activities; to begin living in a law-abiding manner. The famous former crime boss's memoir explains why he eventually decided to jump smooth. These drugs are killing you, man. You've got to jump smooth, or you're going to end up six feet under.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
in. to give up illegal activities; to become straight. (Underworld.) After a night in the junk tank, I knew I had to jump smooth.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.