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Tandem bike 

(N.) A group of women who are on same menstrual cycle.
"After working here for three months, it was only a matter of time before I was added to Mary and Ashley's tandem bike."
Tandem bike by Leon Firestone December 29, 2012
Related Words

Tandem Turd

A turd that reaches both ends of the toilet.
I ate so much McDonald’s that i clogged the toilet with a tandem turd!
Tandem Turd by Pizzasuacc July 26, 2019

Tandem Shitting 

The act of two people taking nasty shits in side by side bathroom stalls at the same time.
Baxter "Did you see those two guys go into the bathroom and drop bombs at the same time"?

Jay "Ya Tandem Shitting is frowned upon".
Tandem Shitting by MadShitter40 January 12, 2012

Ancient Psychic Tandem War Elephant 

A way cool beast that Jake and Finn wish for on an episode of Adventure Time. It looks like 2 conjoined elephants, with orange goggles on each face and golden shotguns for tusks. It also has rockets on it's feet and can shoot a purple beam out of its trunks. If anyone ever comes across one, and you are wondering how it is controlled, just remember; you don't control it, you must let it give you control. It will know if you are worthy to command him because he is psychic.
Finn the human: What should we wish for Jake?

Jake the dog: Something only two bros can share...

Together: Ancient Psychic Tandem War Elephant!!!!!!

Power tandem 

Two power tops who eat, sleep and ravish two unwilling bound and gagged partners together, simultaneously clasping hands, smiling, looking longingly into each others eyes, sharing a most intimate moment and listening to White Snake.
Bill and Jim are exhausted from their power tandem last night.
Power tandem by Power_tandem April 15, 2010
A term used by street drifters to simplify the act of drifting around together. This term is also used by gamers in GTA, Forza, Need for Speed, etc.
Hey Nick, you wanna tandem tonight?

Yeah bro. I'm up for a tandem.
tandem by StrxfestrxfeStrxfw June 25, 2018
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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