Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Slang Made or designed to be used or operated with very little risk of breakage or failure: "These point-and-shoot cameras are almost idiot-proof” ( Donald H. Dunn).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Incapable of being misused even by the most stupid or careless of users.

Etymologies

idiot +‎ -proof (Wiktionary)

Examples

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