slang A federal prison. He definitely seems hardened by his time in the federal jug.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a federal prison. (see also jug.) Lefty is fresh and sweet—just out of the federal jug.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.