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1. verb To make something difficult to ruin or spoil. With all the mishaps so far, I see that you guys didn't exactly goof-proof this plan, huh?
2. adjective Describing something that has been made difficult to ruin or spoil. With all the mishaps so far, I see that your brilliant plan isn't exactly goof-proof, huh?
3. adjective Describing something that is difficult to misuse or make a mistake with. Clear nail polish is goof-proof—I don't trust myself to paint my own nails with anything else!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. mod. foolproof; not subject to misuse. This scheme is not goof-proof, but it’s pretty sound.
2. tv. to make something foolproof; to take action to see that something cannot be misused. See if this can be goof-proofed by Monday evening.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.