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10 minute rule

The 10 minute rule, and in some cases the 5 or even 15 minute rule, is an unwritten rule in schools, colleges and universities.

The rule is used when you have a class/lecture, and the idea is that if the teacher/lecturer is not there in the classroom within the said time period (5, 10 or 15 minutes - depending on what has been decided) then you can assume that they aren't coming and you can therefore leave to do other stuff/go home. This could also possibly be used in the workplace for meetings. (change 'teacher' to 'boss')

N.B. This rule can also be used/changed to deliberately skip classes. E.g. if you know that a teacher will be 10 minutes last, you can switch to using the 5 minute rule and leave before they get there, thereby skipping the class.
Student 1: It's been 8 minutes and Mr Greenwood isn't here yet.

Student 2: 10 minute rule?

Student 1: Good idea. If he's not here in the next 2 minutes, I'm off.
by LemonZeppelin September 23, 2009
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90 10 100 Rule

The rule which states that...

90% of the time a person is no more than 10km from their home, and 100m from their car
I couldn't find you anyware, you broke the 90 10 100 Rule.
by Nards-otc@yahoo.com.au October 26, 2007
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Related Words

12 Hour Rule

The 12 Hour Rule applies to any sporting event where the male athlete(s) jack off exactly 12 hours before their competition. It is proven to raise testosterone levels and enhance performance for any sport.

It is important to not mastrubate too close to your competition, as this will not allow for enough time for your body to restore its testosterone supply. Too early, however, and it will have no effect on your performance.
It is not yet proven if this works on females yet. If anybody would like to test and contribute, be my guest.
Coach: "Okay guys, big race tomorrow. Everybody go home, eat a healthy dinner, and follow the 12 hour rule."
by pikalord November 7, 2010
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19 minute rule

A commonly held practice amongst urban males, by which at least one (though more commonly multiple) sexually active partners reside within a 19 minute commute of the male's place of residence, so as to allow sexual activity that takes advantage of early morning erections (that statistically last approximately an average of 20 minutes without stimulation)
Person A: "Not to be too much of a triflin' hoe, but does your girl meet the 19 minute rule?"

Person B: "Why yes, I am always inclined to follow such practical, time-tested, and, if I may be so bold, satisfying rules-of-thumb."
by Dennard April 7, 2008
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10 Second Rule

If a female does not enter within 10 seconds of a porno that is showing naked males it is a gay film but if a female enters the film within ten seconds it is not a gay film. AT ALL!
Hey Bob why are you watching gay porn? Oh its not gay if a female enters the film within 10 seconds. That's the 10 second rule
by rofl and speedy March 20, 2009
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12 am rule

Anything said between 12:00am-1am is not to be taken literally if furthering the conversation will result in self incrimination.
Girl: “Omg did you hear how john called me a slut?”
Guy: “Yeah I heard, but he’s good because of the 12 am rule ya slut”
by joebidenismyuncle May 3, 2020
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100 Mile Rule

When you are more than 100 miles away from your significant other, you may do whatever you want, including cheat on them
Bob hooked up with Cindy while he was in Vegas, but he knew that his girlfriend Carrie wouldn't mind, because he was covered by the 100 mile rule.
by Sorcyress October 16, 2008
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