20-second rule 

Any computer application must respond to input within twenty-seconds or the person using it will think that the software is broken and begin pressing the "Any Key" to elicit a response.

Internet latency is not an excuse for failure to respond; c'mon, even satellite links have less than 20 second latency.

The iPhone has a 20-second rule start-up timer; if an application takes longer than 20 seconds to start up, it is killed by the iPhone OS. Also, the iPhone OS will kill any application that is unresponsive for longer than 20 seconds.

Usually seen on poorly built web pages that rely on over-taxed advertising servers.

Also violated by Windows OS during the boot process where it waits a whole freaking minute for network connections that are never connected to time out.

20-second rule by BigUncleJohn October 24, 2010

Rule of Duck 

Based on the rule that states:
If it looks like a duck, waddles like a duck, and quacks; it's a duck.

Used in real life to explain the obvious truth of the matter.

Dude 1: Andi was sure cranky when I asked her about last night at the bar. She was going with her girlfriends.
Dude 2: Is that all you asked?
Dude 1: Yeh, but when she got home her shirt was inside out, she smelled like cologne and her back is scratched up. I had to ask.
Dude 2: No you didn't. Rule of Duck. Andi is a whore.

Rule of Duck by abrasive personality August 17, 2011

Rule 63 

Rule 63 is an Internet meme that states that, as a rule, "for every given male character, there is a female version of that character" and vice versa. ... It began to see general use in fandom communities as a term to refer to both fan-made and official gender-swaps of existing fictional characters, so if it's a famous dude, there is a female version

John: Hey have you seen spidergirl?
Me: Yea, its Rule 63, it's a gender swap, real or fake, it;s a female
John: Whats Rule 63?
Me: look it up on the urban dictionary

Rule 63 by SpaghettiSucker39 July 7, 2021

36 Hour Rule

If a houseguest, squatter or friend has left any take-away within your fridge for 36 hours or longer then the food is fair game and is fully within the public domain.

Bob: Dude! Where the fuck is my kung pau?
Alice: Dunno. Where'd you leave it?
Bob: In the fridge
Alice: And it's not there anymore?!
Bob. Umm... No
Alice: Well, how long ago did you leave it there?
Bob: Last tuesday, I think
Alice: Dude; That was like 3-times-the-36-Hour-Rule ago
Bob: WTF is the "36 Hour Rule"?!!!

36 Hour Rule by Bobcats Varsity '09 March 25, 2008

20 minute travel rule

A guy will not and should not drive more then 20 minutes to see a girl unless there is at least a 75% chance he will hook up.

Girl: Hey you should drive out here and see me!
Guy: umm idk its like a 30 minute drive
Girl:oh come on, dont worry i know the the 20 minute travel rule
Guy:ok on my way

20 minute travel rule by Privdonut2 May 30, 2009

ten minute rule 

The amount of time a DVD supplied by a through-the-post rental service has to prove itself watchable. A way of dealing with the inevitable question; "Who the hell picked that!?" when some discs arrive. A damage limitation excercise. Life is too short for bad movies.

Shyamalan's The Happening dropped through the door in the morning so we thought what the hell. We used the ten minute rule. It didn't make it.

ten minute rule by Hierophant September 6, 2009

5-Second Rule 

1. When you're having sex with a pregnant woman and the fetus falls out onto the floor, you have 5 seconds to get it back in or else you must eat it.

2. When you trip and fall on the ground and your homie yells "5-second rule" and starts eating your ass.

1: Guy: Uh oh honey, it just popped out! My bad!

Girl: Well I guess you have 5 seconds to put Cleetus back in.

Guy: Oh, right the 5-second rule!

Oops it's too late now.
*Shoves Cleetus down his throat*

Girl: *Cries*

2: Bro 1: Watch out, your dick's untied.

Bro 2: *trips on dick and faceplants*

Bro 3: 5-second rule!

Bro 1 and 3: Start eating Bro 2's ass.

5-Second Rule by Mike Hawksmall December 16, 2019