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Murphy's Mechanic's Law

Anything in your car that has gone wrong, will ""not"" go wrong when the mechanic is looking.
My high-beam dimmer--switch is faulty, yet when I took the car to the mechanic for troubleshooting, the switch worked perfectly for him! Typical Murphy's Mechanic's Law at work!
by QuacksO July 18, 2018
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Murphy's Law

"Anything that can go wrong, will go wrong".

From an inventor's viewpoint, this is ultimately an argument for keeping things simple and focused on a single task. The simpler an invention is, the less scenarios need to be considered and tested.

Another way to understand it is as though you are living in the future looking back at a problem that occurred:

"If something went wrong with your invention, it's because you didn't do anything to prevent that scenario from happening".

Examples of things you could have prevented but didn't, and thus went wrong:
- The electrical cables burned the house down because the load was too hot. This could have been prevented by adding a fuse, but you didn't.
- The water heater exploded because it didn't have a pressure release valve, which it could have had, but didn't.
- The door fell off the plane when it went upside down because the hinge pin didn't have a lock, which it could have had, but didn't.
- The Earth shifted and caused cracks in the clay pipes under the house, which could have been prevented if flexible piping was used, but it wasn't.

Again, ultimately this is a reminder to keep your invention as simple as possible. It's often tempting to keep throwing new features into it, to make it appeal to a larger audience or solve more problems, but every new feature creates new, untested possible outcomes which can be hard to predict. Hard to predict that is, until they've happened, which they will.
Inventor 1: I created a lightswitch! It has 2 possible states: on or off. I'm aware all of the scenarios that could exist!

Critic: Great, except I see you used iron on the connector pins. Did you account for the corrosive reaction if copper wire is used against the iron? Murphy's Law dictates that it will happen at some point, because it could.
by pjayyy April 11, 2019
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Murphy's law

If something can go wrong it will
What is Murphy's law. Murphy's law is 2020
by Smalltowngirl20 June 5, 2020
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Murphy bedded

When a defective Murphy bed falls on your head and you are rushed to the E.R. In this same incident your tooth gets lodged back into your gums and your becomes inflamed
He tried to open the Murphy bed, then got Murphy bedded. Now his tooth is missing.
by Alester December 24, 2020
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murphy lee

The greatest rapper out of St. Louis who can wreck many rappers and should belong in Hip-hop's greatest before his time is up
Murphy Lee wrecked the rest of the St. Lunatics on any song all of them do together.
by *Wonderboy Marvel* July 25, 2003
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Murphy's Law

The secret of the universe: The Universe is intrinsically dystopic.
During a workshop on "Murphy's Law", the shit hit the fan.
by Kerb November 29, 2004
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murphy brown

after anal sex, you remove your penis and wipe it in her armpit
Last night Paul gave Natalie a messy Murphy Brown
by Nat F November 10, 2008
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