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magic bullet mag·ic bullet (māj'ĭk)
A drug, therapy, or preventive therapy that cures or prevents a disease.
A miraculous remedy for some social, economic, etc, ill: We know no one chancellor has a magic bullet to turn the school system around
[1960s+; fr the name given in 1910 to salvarsan, formerly a trademark, discovered and proposed by the bacteriologist Paul Ehrlich as a cure for syphilis]
Any period when people do silly things, esp when these are reported in the news media
[1861+; fr a term designating the months of August and September, when Parliament was not sitting and valid and useful news was scarce, and the newspapers resorted to reporting frivolities and trivialities]
(Or "silver bullet" from vampire legends) A term widely used in software engineering for a supposed quick, simple cure for some problem. E.g. "There's no silver bullet for this problem".