Similar to 3 second rule, 5 second rule, 10 second rule

An (as of yet) unwritten rule that any food dropped on the floor may be picked up and eaten as long the person who dropped it states the number of seconds it has been on the floor and adds 'rule' on the end.

This is ever extendable for the length of time the food has been on the floor so can be used in any situation, especially if the dropped item is not easily accessible.

It is commonplace to wipe off some of the dust etc. before proceeding to eat
Person 1: Oh no I dropped my sweet under the table!
Person 2: No worries 25 second rule
Person 1: I thought that was just 3 seconds
Person 2: no it's the extendable second rule

*person 1 bends under table, retrieves sweet and eats it*
by JessieJess August 29, 2009
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A highly scientific finding that says that germs need at least five seconds to jump on food that falls on the floor, enabling the person who dropped said food to pick it up and safely consume it, as long as they do so within five seconds of dropping it.
"Hey dude, that cookie's still OK to eat, the five second rule's in effect."
by dungbeetle July 10, 2004
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The rules made by poor persons. It means when you're temptin' to eat the food you've dropped on the floor, just in 3 seconds is okay. But as you know, it is proved that bacterias gather to that food just in 0.3 second quick.
My friend believed the 3-second rules and once ate the gummybear on the floor. He rekt out.
by maximgaren July 12, 2020
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The 5 second rule is used to suggest that food that has fallen on the ground/floor is still fine to eat, as long as it has only been there 5 seconds or less.

Commonly the rule is simply extended to however many seconds is necessary to declare the food still edible (ex: 20-second rule).
"Aww crap, I dropped my hot dog on the ground." "It's alright: 5 second rule."
by p14nd4 July 11, 2004
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Any computer application must respond to input within twenty-seconds or the person using it will think that the software is broken and begin pressing the "Any Key" to elicit a response.

Internet latency is not an excuse for failure to respond; c'mon, even satellite links have less than 20 second latency.
The iPhone has a 20-second rule start-up timer; if an application takes longer than 20 seconds to start up, it is killed by the iPhone OS. Also, the iPhone OS will kill any application that is unresponsive for longer than 20 seconds.

Usually seen on poorly built web pages that rely on over-taxed advertising servers.

Also violated by Windows OS during the boot process where it waits a whole freaking minute for network connections that are never connected to time out.
by BigUncleJohn October 22, 2010
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1. When you're having sex with a pregnant woman and the fetus falls out onto the floor, you have 5 seconds to get it back in or else you must eat it.

2. When you trip and fall on the ground and your homie yells "5-second rule" and starts eating your ass.
1: Guy: Uh oh honey, it just popped out! My bad!

Girl: Well I guess you have 5 seconds to put Cleetus back in.

Guy: Oh, right the 5-second rule!

Oops it's too late now.
*Shoves Cleetus down his throat*

Girl: *Cries*

2: Bro 1: Watch out, your dick's untied.

Bro 2: *trips on dick and faceplants*

Bro 3: 5-second rule!

Bro 1 and 3: Start eating Bro 2's ass.
by Mike Hawksmall December 16, 2019
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A widely known rule used to make morons feel better about eating off of the ground. Supposedly the food god protects all food for 5 seconds after it touches the ground. After which the food god will become angry and infest it with cooties.
Moron: Oh noes my sammich!
Food god: Hurry, pick it up. 5 second rule!
~5 seconds later~
Moron: ...What?
Food god: I am angered! I shall infest your sandwich with cooties!!
by I r mime May 14, 2007
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