An informal notion that food dropped onto the ground is still edible if retrieved within a five second time frame. Variations exist; 30-second rule, 2-minute rule, et cetera.
Damn, that was the last potato chip. Oh well, 5 second rule in effect, right?
by kinsmed July 10, 2004
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The nationally acknowledged time in which after leaving a seat unoccupied it is then acceptable for people to take your seat, usually in a pub or somewhere which has a variety of good chairs and bad chairs. Any attempt to do so before this is an illegal move and that person will have to leave the seat. Although this rule is acceptable amongst your group you are sat with, any attempt to utilise this rule with strangers is not seen as a good idea.
Ahmed "What you doin lad? That is my seat."
Swann "3 second rule. You were at the bar for 5 minutes."
Ahmed "Ah fair play mate. I'll just sit here instead then."
by GF May 13, 2006
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Variants include the three, five, or seven second rule, but rarely further than that.

Refers to the ammount of time a person must be out of their seat before it becomes avaliable for others to steal
*Person 1 gets out of seat*
Person 2: Ten second rule!
*Person 2 collapses smugly into seat. Person 1 may choose to comment upon the sexual orientation of Person 2's mother at this time*
by Chris-Thor August 11, 2007
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if you drop a piece of food on the ground (most likely, something that you've taken a long time to prepare, at a time of crisis right before this needs to be served, or after a long day), you have 5 seconds to pick it up and it will be fine. While it still has germs, these 3 words just may give you peace of mind.
Crap! I just dropped the souffle I've been working on for 3 hours! And Jackie is getting here in 5 minutes! *picks it up* 5 second rule will have to do I guess.
by Meg July 10, 2004
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The amount of time allowed for spraying deodorant or cologne such as Axe or Tag (also called TSR for short). It's the responsibility of everyone around the potential offender to monitor his usage, as excess usage of body spray has been known to render potential hookups (and really anyone) unconscious. Any breaking of the three second rule is punishable by confiscation of the offender's aerosol can and/or death. This rule also applies to aerosol cans such as Febreez and Oust if these products are used in confined conditions.
-Bro 1 sprays Axe product until visibility is reduced to that of a monsoon-

Bro 2: Dude! Three second rule!

-Bro 2 seizes can from Bro 1 and inserts the still-spraying can into Bro 1's throat-
by AdamOpp January 30, 2010
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When stuff you are eating falls on the floor, you have two options. You can pick it up and eat it, or you can throw it out. The five second rule is used when what ever falls is tasty, but you dont want to gross out your friends by eating something dirty. The five second rule, when imposed (usually along with a quick rinse or blow off) makes what ever you still want to eat socially acceptable to eat and void of all dirtyness. The 5 second rule may be be changed to the 10 second rule, the 15 second rul, or the "i have no clue how long its been there" rule.
guy one: dude, you just dropped your good tasting stuff
guy two: aww crap, butter move fast to make the five second rule. This stuff sure isnt good enough for a ten-er or a 15-er.
by Taynton July 10, 2004
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If food drops on the ground, you're still allowed to eat it if it's only been on the ground for 5 seconds or less.
Person 1: Oh shit I dropped my pizza slice
Person 2: 5 second rule!
Person 1: *eats pizza*
by joveblue July 10, 2004
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