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When you're smoking weed and you take a hit and you hold in 100% of the smoke from the inhale, exhaling *zero* smoke from the hit. Done in order to get maximum effect from the weed. Requires great skill and is worthy of respect from other smokers.
"Yo I was ripping a B with Joey Fatone the other day and he was totally zeroing every time ... insane!"
Zeroing by Ol' Prospector October 19, 2009

Zero Wing 

A 1989 horizontal shoot 'em up arcade game that was also ported a year later to the PC Engine CD-ROM (known outside of Japan as the TurboGrafx-CD) only in Japan and the SEGA Mega Drive (SEGA Genesis in America) only in Japan and Europe.

It didn't catch much attention, due to being viewed by many to be just another unoriginal horizontal space shoot 'em up while lacking advertisements. It stayed obscure until late 2000 when the opening of the European version of its SEGA Mega Drive port was discovered as a mistranslation and was used by Kansas City computer programmer and part-time DJ, Jeffrey Ray Roberts, then aged 23, from the Gabber band "The Laziest Men on Mars" created a techno dance track titled "Invasion of the Gabber Robots", which remixed some of the Zero Wing video game music by Tatsuya Uemura, Toshiaki Tomisawa, and Masahiro Yuge, with electronic versions of the quotes from its intro. Most notably "All your base are belong to us", said by an antagonist named CATS, which is similar to "owned", a slang word that originated among 1990s hackers, where it referred to "rooting" or gaining administrative control over another person's PC. This became an Internet meme for a long period of time and is still being used today, even against the arcade and PC Engine CD-ROM versions, although they lack the infamous opening and don't show CATS nor Engrish.
Most people thought Toaplan was responsible for the mistranslated opening of the European Mega Drive version of Zero Wing, but it was actually SEGA of Europe's.
Zero Wing by 1983parrothead July 19, 2009

Zero Wing 

An engrish game in which All Your Base Are Belong To Us spawned from.
Captain: What You Say!?
When two individuals partake in consuming each others anus's.
Ben and Jenny were totally Zeroing last night.
Zeroing by Jack Fearow December 1, 2016
When you inhale smoke till nothing comes out when you exhale.
“Dude my mom came in so I had to zero the smoke, I need to get better at zeroing because some still came out when I exhaled.”
Zeroing by Buggy11706 February 6, 2022
The fermenting of zupezeros sperm
I am currently zeroing
zeroing by Jessepinkpussy July 30, 2025
More from Urban Dictionary
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

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
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