magic bullet

US /ˈmædʒ.ɪk ˈbʊl.ɪt/
UK /ˈmædʒ.ɪk ˈbʊl.ɪt/
"magic bullet" picture
1.

a quick and simple solution to a difficult problem

:
There's no magic bullet for solving all of society's problems.
Many people are looking for a magic bullet to lose weight quickly.