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48 Hour Rule

The rule for the amount of time sperm can stay alive in a person's mouth after oral sex.
Dana: Hi, Katherine, mind if I take a sip of your coke?
Katherine: Are you 48 hour rule safe?
Dana: Yep!
by futureactiveparticiple July 4, 2017
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Rule 34

Something that everyone hates but is never taken down
mugGet the Rule 34mug.

Rule 10

Rule 10 refers to 'Rule 10' in the Super Smash Bros. Ultimate Ireland server, stating
"Rule 10, No Violent or Self-Harm Speech.

We strictly prohibit any form of violent or self-harm speech directed towards others. This includes advocating violence, using hateful language, violent abbreviations, or making threats. Any such speech will result in immediate action. Let's foster a respectful and welcoming environment for all members."

As a means to avoid time-out, 'Rule 10' is used as a substitute to the word 'kill' in the phrases 'kill yourself' or 'i am going to kill myself'.
I'm going to Rule 10 myself if you lose to Pascal
by ZARDKINGMEGACHAD September 2, 2023
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Quidditch Rules

Refers to any competition or game, official or otherwise, where there is one task that has a significantly disproportionate effect on the scoring; Especially where this single task has a huge luck element to it.

This term originates from the rules of Quidditch, a sport in author J.K. Rowling's fictional world of witchcraft & wizardry, in which there are multiple ways to score a handful of points, but the if a seeker catches the Golden Snitch –an action that immediately ends the game– they receive 15x a normal scoring point in the game, thus almost always securing the victory even if they were significantly behind in the rest of the game.
We worked our butts off to score well all semester, but the professor pulled some Quidditch Rules bullsh*t and gave the team who did best on last week's assignment 15x the points of all the other assignments, so the team in last place won.
by Calvin2009 March 19, 2021
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Number one rule of dating

Don’t do it over the phone, social media, etc., because you don’t make a connection with the person even if you know a lot about them.
Dude 1: dude I met a girl
Dude 2: how’d you meet
Dude 1: we met over Instagram

Dude 2: seriously dude, remember the number one rule of dating, don’t do it over your phone
Dude 1: shit I forgot, I’ll tell her
by DeanGullberry69 February 5, 2021
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Rule 17

If there's an Map, there will always be an de_dust2 version of it
Hey dude, you finally made a de_dust2 version? Rule 17! you must also drop the A-site platform!
by epic deltarune shit November 4, 2025
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Rule 34

War is good for business - Ferengi Rule of Acquisition 34. Easily confused with the 35th Rule, which is that peace is good for business.
Lt. Dax mistakenly stated that Rule 34 was that peace was good for business. Quark corrected her and told her that was actually the 35th Rule.
by Storm Sexxwatt August 5, 2021
mugGet the Rule 34mug.

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