Top definition
An un-written rule given to the amount of time food can be consumed after falling onto the floor. You should pick up the food quickly if you want to eat it. Usually 3-10 seconds before it is deemed to dirty to eat.
"Shit i dropped my toast on the floor"
"Quick dude pick it up. 5 second floor rule!"
by Some DUDE!!!!@ September 17, 2006
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