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Pronunciation varies by accent · adjective
(informal, humorous) Incapable of being misused even by the most stupid or careless of users..
I tell you, this scheme is idiot-proof! It can't go wrong.
Use idiot-proof when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Idiot-proof means (informal, humorous) Incapable of being misused even by the most stupid or careless of users..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
I tell you, this scheme is idiot-proof! It can't go wrong.
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