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The day to celebrate the battle of the Mayonnaise.
Whoa It's June 11th time for the mayo day
Mayo day by pookiesgramma July 9, 2018

yello mayo day 

The day Yello takes me out for my birthday to Chilis when she gets her first pay check. and then we rent a movie and watch it!! The date is unknown as of now
Yello is taking Mayo out for her birthday.
yello mayo day by tomanda (mayo) March 28, 2003

Mayo Slap Day 

Mayo Slap Day is an annual event that occurs on January 9th in which you slap your friends with either a packet or a handful of mayonnaise.
Please note that cum is NOT a replaceable substance for mayonnaise during Mayo Slap Day.
Mayo Slap Day by 1 Deleted Account January 6, 2023

Mayodaynoche 

When you trust someone who says gyro that isnt able to say mayonnaise
Person 1: "i'd trust him to say mayonnaise"
Person 2: "Mayodaynoche"
Mayodaynoche by Cinnamonthesnep September 19, 2025
More from Urban Dictionary
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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