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11th Base 

Having Sex in the 11th dimension.

Usually involves Supergravity and M-theory. This results in having sex with your lover of choice, then ending up with your grandmother 46 years ago, then in a different galaxy, and finally you inexplicably become a tentacle monster that, for some reason, looks like a deviation of George W. Bush.

As you drift into eternity, screaming every known and unknown language, you question why you bothered to look past 4th base. You become insane.

Then you Die.

...In other words, a fun time. =D
I went to 11th base with Jenn last night.

ןoן ¿¡ʎɐs noʎ pıp ʇɐɥʍ 'ǝpnp ʞɔnɟ!!!!?!!

...What?
11th Base by Intoxicable April 23, 2011

114th base

After receiving a prophecy from the oracle of Saint Höl, you must embark on lengthy quest to find the BFG’s left testicle. After retrieving the testicle, you must climb into the BFG’s urethra to return it to its home. After the return, you need to tickle the BFG from the inside to make him cream, pushing you out of his urethra. Afterwards you will be enlightened, spreading the gospel of the big friendly giant.
“What’s three plus four?”
“114th base”

“What”

Example 2:
“What would you do for a Klondike bar?”
“Pretty much anything, but 114th base sounds like a stretch”
114th base by Saint Höl November 29, 2022

12th base 

To defy the laws of physics whilst engaging in sexual intercourse.
A common example is to have sex listed as the 'Bat Position' in the karma sutra, and that is to have sexual intercourse on the ceiling.
I went to 12th base last night and i got such a rush to my head.
12th base by Rhodri Griffiths July 30, 2008

12th base 

A sexual act including a saddle and/or table tennis paddle
guy 1: we got so far last night
guy 2: what base
guy 1: 12th base
guy 2: Woah!!! how did u get a saddle into her car

11th base 

Cervical sex. Side effects include: severe pain and bleeding, 80% chance of ruining baby carrying potential, and a light feeling of death. Most likely a good idea to proceed immediately to the hospital after. Note it is an absolute prerequisite to attempt sex with the Fallopian tube - the 12th and penultimate base - superseded only by wound sex, such as skull fucking.
After 3 hours of using the osmotic cervical dilator, I penetrated directly into her womb, reaching the legendary 11th base.
11th base by limitbreaker9000 February 2, 2019

113th base 

Few people have ever made it to 113th base, and even fewer have done all 112 of the predecessors. In order to achieve the legendary 113th base, you must find and retrieve the fabled Sword of Gamelon and kill the nearest person named Fred. After doing that, locate a woman named Susan and stab her. After that, fuck the hole that you have made.
Person 1: "Dude, I got to 113th base on Thursday."
Person 2: "The FBI are already on the way you sick fuck."
113th base by Skewber April 25, 2017
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
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