5 year rule 

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!

5 year rule by notsoslick January 7, 2019

5 year rule 

A rule that says a couple should not have kids within the first 5 years of their relationship or marriage.

Damien: I love our kids, but they are too much trouble

Tasha: I know, it's hard work

Damien: We should've followed the 5 year rule, and not have them very early in our marriage

Tasha: Agreed

5 year rule by chanceplan314 October 11, 2024

21.5 year rule 

The amount of time after a tragedy when it becomes acceptable to make fun of it.

"Man, she went off like Mount St. Helens!" = Acceptable within the 21.5 year rule. Mount St. Helens tragedy was in 1980, well over 21.5 years ago.

"Man, she freaked out like the people on the planes right before they slammed into the towers!" = Unacceptable within the 21.5 year rule. Will become acceptable on March 11, 2023.

21.5 year rule by mynameisbeingused August 11, 2008