1 definition by Auto_Insurance

Top Definition
Informal:

A popular axiom that deems food dropped onto the groud edible for a period of 5 seconds immediately following its release. Does not apply to porous or otherwise absorptive foods such as frosted cake or ice cream.
-No! Don't eat that!
-Nah, it's O.K. Five second rule!
by Auto_Insurance July 10, 2004

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