To obtain or make use of something that belongs to someone else by begging. Hey, can I bum a pen to use on this test?
See also: bum
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.