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A small attachement to a word to change it's meaning
Submarine
Word:Marine (sea, ocean, water)
Prefix:Sub-(Definition= under)
Submarine= under water
Prefix by A1235 June 12, 2010

Championship Prefix 

The ability to turn any word in the dictionary into it's most superior form just by adding the word "Championship" in front of it.
Non-awesome: "Water"

Awesome: "Championship Water"

Non-awesome: "Bagels"

Awesome: "Championship Bagels"

"It was not just a good powerpoint presentation, it was a Championship powerpoint presentation!"

As you can see, the Championship Prefix can make anything way more badass than it used to be.
Championship Prefix by Paddywack February 17, 2009
an addition that is added to the beginning of a word to give it a different meaning
add-word-to join 2 sums together
+ re-prefix- again = readd-modified word - to join 2 sums together again
prefix by zach johnson May 9, 2008
When, prior to consulting a professional, an unskilled moron tries to fix a partially broken item, but instead renders it completely useless in the process.
I prefixed my bike chain with some dish soap and a hair pin before taking it to the shop.
prefix by Blue Jay Scott December 30, 2009

prefix: mc 

can be added to anything as an insult or otherwise
also anything relating to mcdonalds
you're a mcdeushe
go jam a mcdildo up ur ass
prefix: mc by Derock May 29, 2004

Common prefire spot 

An excuse used by online gaming cheaters to get away with suspicous pre-firing
Besides it being a common prefire spot, I don't know why he would shoot that!
Common prefire spot by Guazidas February 9, 2022
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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