A long standing rule in which any food which is dropped on the floor/ground is still "good" and edible if it was only in contact with the surface for less than 5 seconds. Incorporated mainly by clumsy children but is often used by teenagers and adults as well.
"Dude, this hotdog is awesome....damn, I dropped it on the ground. No big deal, its still good takes a big bite, 5 second rule!! mumbles with mouth full"
by zebo2k July 11, 2004
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the 5 second rule is for Chairs, so if you get up another person has 5 second to take your chair
Bill: drinks anyone
ben: Beer please
Gail: tea
Ron: Coffee
Rob: Lemonade
Bill: okies
Rob: 5..4...3...2...1..0 JAcked
Bill: wat you going in my chair
Rob: 5 Second rule mate
by Checken April 15, 2008
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when it is okay to pick up a pick of food or candy from the floor if it has been on the floor for 5 seconds or less, as if germs and filth cannot adhere to an edible morsel during that time frame
Go ahead and eat the m&m -- the five second rule is in effect.
by Winsi July 10, 2004
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when you fart really loud if someone can't spank you in 5 seconds they can't spank you after that
oops i farted really loud now I gotta run around so the 5 second rule will take place
by Dragoon 1337 April 10, 2005
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when you drop something (usually food) you have five seconds to pick it up or you no longer can eat it.
whenever i drop food on the floor, i use the five second rule so i can still eat it.
by Maleaya July 10, 2004
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Waiting five seconds to reply to someone to give the impression that you haven't been waiting for their reply
Tom: Why haven't you replied to her already

Tim: IM 5 second rule

Tom: Oh so she doesn't think you're obsessed with her.
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The rule that states if any edible object should touch the ground it may still be eaten if picked up within 5 seconds. (No matter how nasty the ground or surface may be.)
Tanisha dropped an M&M on the wet and dirty bathroom floor but ate it anyway claiming it was safe due to the 5 second rule.
by Anthony July 11, 2004
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