fairy dust noun3 •A magical powder that would give the power of flight to whoever it was sprinkled on.Of course Peter had been trifling with them, for no one can fly unless the fairy dust has been blown on him. — 1911 •Any apparently magical ingredient or effect; a panacea.It's not that some magic private sector fairy dust makes the firms all be runs^([sic]) soundly. Lots of bad businesses are out there. But they tend to lose money and close. — 2011 •(slang) The drug phencyclidine.