2% rule 

The 2% rule is a reference measurement noting the relative amount smarter you need to be (or think) to be able to pull off a particular task.

Frequently used as a gentle insult or to point out someone's apparent stupidity, usually in direct reference to a task said person is presently trying to accomplish. Typically but not limited to involving the use or inability to use a piece of technology.

Person 1: I can't get my phone to upload this picture I just took of myself to Myspace.

Person 2: 2% rule.

or

Drunk guy 1 (after having a few more drinks): That dude doesn't look so tough anymore. I'm gonna kick his a$$ now.

Less drunk guy 2: That last shot dropped you down to 1%.

Drunk guy 1 (slurring): Wait, whut?

2% rule by deadw8 May 30, 2010

Christian's 4-2 Rule

A debate rule which goes as follows:
At the average 6 round tournament, you should expect to lose two rounds. One of these rounds will be against a team that kicks the shit out of you, and the other will be a slip up. The four other rounds are won.

Wayzata: Christian's 4-2 Rule holds true once again at the NDF tournament
Vaskez: told you!

Christian's 4-2 Rule by ccans July 26, 2021

The 2 year rule 

Rule: A partner (usually boy) may have a relationship with another partner (usually girl) as long as the other partner (girl) is 2 years
or less younger. May not always apply to those 18 and older

If I'm 16, the 2 year rule allows me to date some one of at least 14 years old

The 2 year rule by juanrave13 January 4, 2015

2 minute rule 

rule meaning that while texting a chick that you have no relation with you must wait at least 2 minutes before texting her back

"ay bro dat shawty right there, she want you. You better use dat 2 minute rule cuz you too coo"

see "too coo" for further definition

2 minute rule by $aint January 18, 2008

2/3 rule 

A rule that states that if a food item sounds 2/3 good, it must be good.

Originated at a Taco Bell, whereupon the creator was deciding whether or not to buy a Caramel Apple Empanada. The creator had no idea what an empanada was, but caramel and apple made it sound 2/3 good. The Caramel Apple Empanada turned out to be delicious, and thus the 2/3 rule was born.

Indecisive customer: "What's fried chocolate guano?"
Friend of indecisive customer: "I don't know, dude, but it sounds 2/3 good. By 2/3 rule, you have to try it."

2/3 rule by Rhiever April 21, 2009

Rule 2 

Do NOT, talk about /b/.

Some person- What's /b/?
*BOOM HEADSHOT*
Other guy- Rules 1 and Rule 2 bitch.

Rule 2 by Mboone April 21, 2010

Rule 2 

Do NOT talk about Rule 1

Person 1: Hey do you remember rule 1?
Person2: Woah bro... rule 2...
Person 1: Sorry I forgot

Rule 2 by Internet rules October 8, 2019