A unspoken rule where if any sort of food falls to the ground, if you pick it back up in 5 seconds or less it is still okay to eat.
Oh no i dropped a skittle, its only been 3 seconds, its still good.
by Nathan Charette July 10, 2004
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applies to how long a food that has been dropped on the ground is edible.
don't touch it, mario dropped that a minute ago! hey, dude, 5 second rule.
by Erin July 10, 2004
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The rule that states that if you don't like what you see from a person in the first ten seconds you see them, than you will most likely not like them later on.

Is ussually used on apparent douchebags, seemingly annoying bitches, or preppy-ass motherfuckers.
Jim: Ay, Carl! Look at that guy over there.
(Carl looks at apparent douchebage and applies 10-Second Rule)
Carl: He looks like a fucking douche.
by AlexTheOmnipotent April 1, 2013
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h2oincfs' Corollary:

The food can remain on the floor for longer than five seconds, as long as you started reaching for it before the five seconds expired.
I had to change position after my first attempt to reach the Cheesy Poof that had fallen under my desk failed. However, I had begun the attempt before five seconds had passed, therefore the five second rule was not broken.
by h2oincfs March 23, 2005
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The supposed amount of time (5 seconds)you have to pick up food after it's been dropped on the ground or floor. Allegedly, the bacteria doesn't get on it before 5 seconds is up so you can still eat it if you pick it up really quickly. Sadly, it's all bullshit and not true but it makes good for justification - mainly so people don't call you gross.
*drops an ice lolly*
"FIVE SECOND RULE!"
*picks it up, brushes it off, sticks in mouth*
by Nadia July 10, 2004
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when food falls to the ground from your mouth/hand/counter/etc if its down for less than 5 seconds its still okay to eat any longer and it is trash
I was eating my cookie,tripped,dropped it on the floor,but it was down for a second,and was still eatable.
by Iceey Baby July 10, 2004
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Any food that has fallen on the ground is allowed a maximum of 5 seconds before it is left as trash.
Well...I picked up this banana before it was on the ground for longer than 5 seconds. That's the 5 second rule.
by Joel July 10, 2004
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