In today's lab, you're gonna be working with dihydrogen monoxide. Now in large amounts, it could cause suffocation and death. If the subtance is heated, it could cause severe burns. Cold versions of this substance can also cause frostbite. Handle this lab with extreme caution, please.
by Ichigo69 November 2, 2009
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Sometimes shortened to DHMO or {H2O, it is the molecular name for water. For more information about chemistry, go to a science website. For more information about water, visit your local water bottle

NOTE: Being such a rare term, it is commonly used by 4Chan to prank people. A common prank is listed below.
Did you know that there is a substance called Dihydrogen Monoxide that causes a lot of death and disturbance every second? When you breathe DHMO, you die. But Big Pharma doesn't want you to know! Dihydrogen Monoxide is present in every single vaccine, and 100% of Autistic children have drunk it. Big Pharma has put DHMO in all your medicines, and even Homeopathy cannot exist without it. If you drink too much, you die. But yet, you are given DHMO at the doctor's office when you ask for water. SMH my head Big Pharma will never learn
by swntimentoffreedom May 21, 2019
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A molecule consisting of one carbon and one oxygen atom. Commonly produced when a flame does not have enough oxygen to combust completely.
I could really smell the carbon monoxide coming off that smothered candle
by the sneaky pigeon March 17, 2017
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What somebody is going to breathe instead of oxygen if you stick their head next to an exhaust pipe intentionally.
If a guy has a knee on his neck while his head is right near an exhaust pipe of a car, he has nothing to take in but car exhaust. Just like somebody sitting in a garage with the grage door closed and a car running. Death is from both lack of oxygen and carbon monoxide.
by Solid Mantis April 15, 2021
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Toxic or blasphemous talks or rumors about the Trumps and their diehard morally bankrupt donors that residents living in the vicinity of Mar-a-Lago are sick of hearing every other day, which have negatively impacted their property prices or businesses in their once-sunshine state.
Floridian authorities are clueless how to remove all trump monoxide that is lingering over their state following scores of complaints from even angry patriots-neighbors and property agents, who’ve threatened to stage days-long protests outside the FBI-searched resort if the Hoarder in Chief refused to move out.
by Fasters June 22, 2023
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Ho.
Used to avoid actually coming out and calling the person a ho to their face/behind their back. Use responsibly.
Danika: Look at that girl sitting next to Hot Guy.
Lisa: Don't worry she is a Hydrogen Monoxide, he won't be interested.

"I feel like such a Hydrogen Monoxide, I burned 400 calories five times this weekend!!"

Marissa: You're such a hydrogen monoxide
Blonde girl: Like, what?
Marissa: Exactly.
Blonde girl: Well...Thanks!
by Danisa Lisika April 11, 2008
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