slang Any powdered recreational drug, especially heroin or cocaine. You're going to end up dead the way you're mainlining that joy dust. When people started snorting lines of joy dust off the kitchen table, I knew it was time for us to leave.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See joy flakes
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.