In medicine, a magic bullet is a drug or treatment that can cure a disease quickly and completely.
2. countable noun
A magic bullet is an easy solution to a difficult problem.
[informal]
A lot of people are looking for some sort of magic bullet that will solve this problem.
magic bullet in British English
noun
informal
any therapeutic agent, esp one in the early stages of development, reputed to be very effective in treating a condition, such as a malignant tumour, by specifically targeting the diseased tissue
magic bullet in American English
any invention, discovery, solution, etc. that solves a particular problem; esp., a medicine that can cure a disease