The phrase "bullet solution" refers to a quick and effective way to solve a problem or issue. It implies that a single action or strategy can provide a swift resolution, similar to how a bullet quickly hits its target. Full definition
«There is no silver bullet solution for food waste; it needs to be tackled in a range of ways, and everyone has a role to play,» she said. (gmaonline.org)
There is no magic bullet solution for marketing books and book marketing is tough! (toughnickel.com)
It's resources like this that can turn a school around rather than seeking a non-existent silver bullet solution. (neatoday.org)