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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 07, 2019
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Apr 25 Word of the Day
v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)
The committee commenced blamestorming over the situation rather than seeking solutions to the problem.
by TBea April 22, 2008
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