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go full mayonnaise 

To perform sexual intercourse with an extraordinary loose (and moist) vagina, mimicking the auditory experience of penetrating a jar of mayonnaise.
Today I'll go full mayonnaise. My wife gave birth the other day.

fullmoon 

When someone bends all the way over (usually to pick something up) and their butt is high in the air, facing you.
girl bends over to pick something up
guy: fullmoon!
girl blushes
fullmoon by hkwyllis April 27, 2007

Fullmoonbill

When a person inserts a foam dart into his anus
john-look at that kid that darts so far up his ass!

jamal-yeah hes totally fullmoonbilling it
Fullmoonbill by dilliam August 30, 2010

Fullmoontoilet

The act of leaving urine and/or feces in the toilet by an Indian parent based on superstition of the full moon, told to them by a lazy and/or dying parent, as an excuse for laziness for not flushing the toilet. The guilty parent will tell the child that to ward off negative effects of the full moon, they had to leave waste in the toilet as a sacrifice, and the kids must clean it up. This superstition is usually shared among the most uneducated population of India, and the children who were victims of the excuse often believe it and carry it into adulthood when they don't flush.
Dude, my dad fullmoontoileted last night. He keeps ranting that he had to do it to save us from narak, but the real Armageddon is in the toilet right now, and he expects me to flush it. Why can't we just go to the temple like a normal family to ward off evil. Wtf...
Fullmoontoilet by DevilTrigger June 16, 2019

Fullmoon Arrival 

When a man ejaculates on an elderly woman's corpse that's been freshly dug up on a full moon.
Bruh, did you see the obituary? I'd give her a fullmoon arrival!
Fullmoon Arrival by Xpi_Piper September 9, 2021

Fullmoon Arrival 

When a man ejaculates on a elderly woman's freshly dug up body, on a full moon.
"Bruh- Did you see the obituary? Check the lunar calendar and grab the shovel, we're going to the cemetery! We're giving grandma a fullmoon arrival tonight."
Fullmoon Arrival by Xpi_Piper September 12, 2021
More from Urban Dictionary

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
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026
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