Like the 5 second rule for food landing on the floor, or the 5 minute rule for leaving class when a teacher is late the 5 year rule is time frame after the wedding to have a bachelor or bachelorette party if said party didn't occur or was so lame that it isn't even worth a mention.
Married guy: Aargh! My bachelor party 4 years ago was crap... wish I could have done it properly.

Good friend: Brrrooo! 5 year rule! We throw you a bitching party this weekend! It's going to be the shit!!!

Now happily married guy: Yeeeeaaahhh!
by notsoslick January 7, 2019
Get the 5 year rule mug.
The 5 second rule is used to suggest that food that has fallen on the ground/floor is still fine to eat, as long as it has only been there 5 seconds or less.

Commonly the rule is simply extended to however many seconds is necessary to declare the food still edible (ex: 20-second rule).
"Aww crap, I dropped my hot dog on the ground." "It's alright: 5 second rule."
by p14nd4 July 11, 2004
Get the 5 second rule mug.
1. When you're having sex with a pregnant woman and the fetus falls out onto the floor, you have 5 seconds to get it back in or else you must eat it.

2. When you trip and fall on the ground and your homie yells "5-second rule" and starts eating your ass.
1: Guy: Uh oh honey, it just popped out! My bad!

Girl: Well I guess you have 5 seconds to put Cleetus back in.

Guy: Oh, right the 5-second rule!

Oops it's too late now.
*Shoves Cleetus down his throat*

Girl: *Cries*

2: Bro 1: Watch out, your dick's untied.

Bro 2: *trips on dick and faceplants*

Bro 3: 5-second rule!

Bro 1 and 3: Start eating Bro 2's ass.
by Mike Hawksmall December 16, 2019
Get the 5-Second Rule mug.
A widely known rule used to make morons feel better about eating off of the ground. Supposedly the food god protects all food for 5 seconds after it touches the ground. After which the food god will become angry and infest it with cooties.
Moron: Oh noes my sammich!
Food god: Hurry, pick it up. 5 second rule!
~5 seconds later~
Moron: ...What?
Food god: I am angered! I shall infest your sandwich with cooties!!
by I r mime May 14, 2007
Get the 5 second rule mug.
A common texting agreement between two or more acquaintances that after a 5 minute period with no reply, you must accept the fact that the person you are trying to reach does not want to talk to you. After this 5 minute period, you may not re-send your message, send a new one, call, or apologize for interrupting their meeting. This agreement is usually made official by means of contract, or simply by not disagreeing when the rule is suggested.
Man 1: Hey man 2, lets go to the club man!

Man 2: Ahh man I can't, im waiting for Katie to reply.

Man 3: Dammit Man 2, you've been waiting for Katie to reply for at least 6 minutes now. 5 minute rule dude.
by Mr. Yell-O March 8, 2010
Get the 5 minute rule mug.
Contrary to the belief, it is actually 5 seconds from when you see the food that you may consume it without it being dirty or at all harmful to your body because, come on, it's only been five seconds.
"Sweet! A cheeto!"
"Dude, that's been there for 3 days."
"But I just saw it, like, 3 seconds ago. 5 second rule yo."
by Sabrina O'Henry May 6, 2007
Get the 5 second rule mug.
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
Get the 5 second rule mug.