1. One who shirks work or responsibility: "In terms of their outlook on the future, slackers regard tomorrow with a studied cynicism or . . . don't even conceive of one" (Julie Caniglia).
2. One who tries to evade military service in wartime; a draft dodger.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.