The idiom "it won't fly" means that something is unlikely to work or be successful. It is often used to express doubt or skepticism about an idea, plan, or proposal.
For example, if someone suggests a plan that seems unrealistic or impractical, you might say "that won't fly" to indicate that you don't think it will work. Similarly, if someone presents an argument that you find unconvincing, you might say "that argument won't fly" to express your skepticism.
The phrase "won't fly" is derived from aviation, where it refers to an aircraft that is unable to take off or remain airborne. In a figurative sense, it suggests that an idea or plan is similarly unable to gain traction or succeed.
Overall, "it won't fly" is a useful idiom for expressing doubt or skepticism about an idea or plan, and is commonly used in both informal and professional contexts.
• The company's new product design won't fly in this market.
• After reviewing the new budget plan, the financial analyst concluded that it won't fly and suggested some changes.
• The politician's controversial proposal didn't fly with the public, and he lost a lot of support.
• We tried to convince the boss to implement our idea, but he said it won't fly.
• I've been working on this proposal for weeks, but I'm afraid it won't fly with the board of directors.
• It won't fly if you throw it too hard.
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