(fantasy) Magical dust associated with pixies; fairy dust. / (figuratively) Any undefined means of working magic, in a metaphorical sense.

(idiomatic) To remain untouched and unused for a long period of time.

A magical powder that would give the power of flight to whoever it was sprinkled on. / (by extension) Any apparently magical ingredient or effect. / (slang) The drug phencyclidine.

Alternative spelling of smartdust

(Britain) Alternative spelling of dustbin

plural of dustbins

(slang) Phencyclidine, a type of dissociative anesthetic. / (Ireland, slang) Clenbuterol, a banned growth hormone formerly used in animal feedlots.

plural of dust bunny

Alternative spelling of dustup

The application of fertilizers, pesticides, and fungicides onto crops from an aircraft / (informal, humorous) The act of breaking wind in public while passing by people.