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If you are reading this rule and you don't own the device that you are reading it on, you will be hit by the owner in any form or fashion that they choose.
Sam: Dude check out this rule
Jimmy: Hey! That's my phone!
Jimmy: Rule 18 (Hit)
Sam: Damn It
Rule 18 by DaCsquared November 6, 2010

rule 18 for voice calls 

if shes gonna masterbate, the mic must be off if your mic is off. Equal rights, Equal fights and its simple
Girl: I am so horny, imma go mute and do smt rq
Man: "rule 18 for voice calls", BRO U CAN'T MUTE
Girl: Your right, I won't mute then
rule 18 for voice calls by evoshere October 27, 2022

Space Rule 18 

When inviting women to a party always remember Space Rule 18.
Space Rule 18 by chukheston May 26, 2018

18 Second Rule 

1. The term designated to the average time it takes a doctor to interrupt a patient who is describing their own symptoms. Coined in 1984 by Beckman and Frankel in the Annals of Internal Medicine. This is used by doctors to control the flow of pertinent information regarding the symptoms, keep focus on what's important, and keep the conversation brief.

2. An informal term designated to how much time it takes in average for a person or animal to completely empty their full bladder unimpeded and without forcing it. Briefly mentioned by the show Mythbusters during the testing of the myth "Peeing on Third Rail".
1. The patient may ramble on about their daily lives, but you gotta know when and how to intercede. In average, doctors learn when to speak in the examination at about 18 seconds. This is known a the 18 Second Rule.

2. Did you know that it takes you the same time to pee as an elephant does regardless of the fact that it's bigger than you? 18 Second Rule, man!
18 Second Rule by Abarbarea February 25, 2021

"18 Innings" Rule 

In baseball circles, a term used to send a short texting. The rule signifies the unwillingness of a spectator/diehard fan to depart from a ballgame before its completion, irrespective of how many innings it may take to do so beyond the standard nine innings of the sport.

Origin of the term is not known, nor the reason for the selection of the number 18, except to simply note the length of two regular games. Potentially, extra innings can extend indefinitely past 18, but it's rare.
A text message by Friend #1 using "18 Innings" Rule:
"Game tonight? 18inn in effect."

Friend #2:
"Can't risk it. Long drive ahead early tomorrow morning... family vacation... but thanks anyway!"

Friend #3:
"I'm game. But will drive separately, just in case."
"18 Innings" Rule by Kayrocker October 4, 2009

Rule 1881 

An internet rule that states:
N00bs can not, under any circumstance, pwn ANYONE. This rule can not be ignored, changed, broken, or countered. A n00b is anyone who has joined a site less than 6 months ago.
A n00b: *Wins an argument*
Non-n00b: Rule 1881...
N00b: Damn...
Rule 1881 by Alyssia Rain January 17, 2009
More from Urban Dictionary

briefcake 

"Did you check out the briefcake in courtroom C?"
briefcake by Ben Frey April 6, 2006
Word of the Day on November 3, 2026
Brought to public attention by Bob Woodward and Carl Bernstein in the book on the fall of Richard Nixon, All The President’s Men, ratfucker was Nixon’s term for a political operative who sows chaos among opponents; an agent provocateur. It is thought to have originated among campus political rivalries at USC, and seems to have some usage in the US military.
Along with Nixon’s other ratfuckers, Roger Stone caused fights at otherwise peaceful Democratic Party protests to generate a false narrative that the Democrats were violent and dangerous.
Ratfucker by Ricky Ramjet November 2, 2017
Word of the Day on November 2, 2026

countrypolitan 

Term used to describe someone who is a mix of both rural (country) and urban (metropolitan) lifestyles/upbringings. He/she is typically equally comfortable in both settings and is able to seamlessly slip back and forth between the two, appreciating the characteristics of each.
That ol' gal of mine drives the 12 lane freeway during the week and a John Deere on the weekends. She likes opra and the Grand Ol' Opry. I love them countrypolitan women.
countrypolitan by MOChick November 7, 2006
Word of the Day on November 1, 2026

Witch Bath 

A bath consisting of a variety of slats, oils, soaps or any other added ingredients such as fruits, milks, herbs or any other spices for health or beautifying benifits.
She brought home alot of stuff and took it to the bathroom. She must be taking a witch bath.
Witch Bath by carnieboy30 October 26, 2020
Word of the Day on October 31, 2026

kinktober 

An excuse for people to write porn with different types of kinks throughout the month of October.

Smut Fanfiction
That chick doesn't write often but when she does, its for Kinktober.
kinktober by Kinkiest July 12, 2018
Word of the Day on October 30, 2026
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