/ Dictionary / Index H happy dust: Meaning and Definition of Find definitions for: hap'py dust" Pronunciation: [key] — Slang. Slang. cocaine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. happy happy-go-lucky Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language