it will never fly

There's no chance that something will work or be successful. He wants to work from home full time, but it will never fly with the bosses. It's an interesting concept, but it would never fly with ordinary consumers. You can suggest a three—day school week, but I can tell you right now that it'll never fly with the headmaster.

will never fly

Will never be accepted. That kind of excuse may have worked in high school, but it will never fly here. The deadline for the paper is tomorrow, no extensions. His portrayal of the iconic character will never fly with fans—it's not anything like in the comic books.