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National Invader Zim day 

Q: Whats ur favorite holiday? A:National invader zim day!

Zim dollar 

A basket case of a currency which has circulated at various times in Zimbabwe (Rhodesia) - an impoverished nation which was once the breadbasket of Africa.

At one point, the country's currency plunged to a record low Z$28,4 quadrillion to the U.S. dollar, triggering massive price increases with hyperinflation estimated at over a quintillion percent, although no one really knows.
A sign in a South African restroom at the height of the 2008-09 economic collapse:

Toilet paper only To be used in this toilet

No cardboard

No cloth

No Zim dollars

No newspaper
Zim dollar by bitchuck August 21, 2025

Dirty Zim 

When you have a sexual fantasy to have sexual intercourse with an alien or in outer space.
“I just did a Dirty Zim with a hot cosplay chick”
Dirty Zim by Time_chey April 22, 2020

Dirty Zim 

A “Dirty Zim” is slang for wanting to have sex with an alien or in outer space.
“I have such a huge fantasy for a dirty Zim”
Dirty Zim by Time_chey April 22, 2020
an incredibly sexy person; a person so sexy that everyone else pales in comparison to him; only used to describe or name a male
Since he was so sexy, they called him Zimdars.
Zimdars by Tim Zimdars July 16, 2008
A sixth sense, or an intuitive sense that picks up narcissistic people when they start talking.
A Zimdar can be set off when you meet someone and during conversation you receive the notion that he/she is conceited (i.e. believes everyone else is below them; thinks he/she is always right and noone else is).

My Zimdar goes off whenever I'm in a conversation with Chuck since conversations with him end up with him correcting me on topics I've already researched, or have in-depth knowledge about.
Zimdar by Bewnam Ajnin April 30, 2008
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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