Also found in: Medical.
slang Any powdered recreational drug, especially heroin or cocaine. You're going to end up dead the way you're mainlining those joy flakes. When people started snorting lines of joy flakes off the kitchen table, I knew it was time for us to leave.
joy flakesand joy dust
n. powdered or crystallized cocaine. (see also crack.) She said what she wanted was some joy flakes, and I guess that’s cocaine. “Joy dust” is sort of crack without the press coverage.