Short for the band "My Chemical Romance". (Also referred as "mcr")
A modern rock band best known for their albums "The Black Parade" and "Three Cheers for Sweet Revenge."

The band members are Gerard Way (singer) , Mikey Way (bass) , Ray Toro (guitar), Frank Iero (guitar), and Bob Bryer. (Drums)

Formed in 2001, and still rocking hard.
"I saw a My chem poster at the mall, but didn't have any money to get it."

"I totally wanted to go to that My chem concert!!!!!"

"My favorite band is defiantly My chem."
by MCR ROCKAH! August 8, 2009
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A branch of engineering that is vital to the sucess of society. They are kindoff the bastard child of chemistry, mechanical engineers and industrial engineers.

They run the power industries, design plants and the processes that go on in them and the machines and measuring devices in them. They make plastics, pulp and paper, nuclear power, hyrdo, petrol, as well as clean the water and the air.

Chemical engineering involves lots and lots of calculus, thermodynamics, fluid mechanics, material science, electronics, physics and chemistry. We are the ones that decide if the vessel can withstand the pressure generated as the reaction takes place in the factory. If not, we find ways to fix it. It takes a vigorus course load and plenty of studying to compleate a degree in chemical engineering.
Chem eng ruined my life. My plant design project took all my time and energy.
by electrick February 3, 2006
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Acidic-like male semen caused by a diet of basically nothing but Takis and Mountain Dew.
I finally gave in and gave Mike some sloppy last night. I let him nut and my throat is raw today from his chem-nut. I told him to start eating pineapple or something.
by Dick Onchin April 11, 2020
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A Slang term for LSD, typically refering to blotter paper, but may be applied to other forms of street lysergic acid diethylamide such as liquid or gel tabs.
Rob where did you stash the chem homework? This kid wants to Meet our Friend Lucy.
by Matt Schroeder April 27, 2008
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a shortend version that the band my chemical romanceuse to discribe themselves.
random interveiw guy:what are some of your new songs?

gerard way:well "my chem" are wrighting a new song at the moment.
by Joey black July 5, 2006
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British gay slang for sexual activity that involves the use of drugs and or intoxicants by either party.
"hey mate you up for a chem sesh"

"yeh lad but i don't do crystal"
by nunuboy January 9, 2010
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(chemistry orgy, chem party, chemistry party)
a gathering of AP chemistry students (cuz general chem is for n00bs), usually in an online chatroom, right before a major assignment is due i.e. a lab, a quiz, or a test.
Chem orgies consist of these students trying to organize an online study session. These "study sessions" usually end up as a bunch of kids in an online chatroom late at night spamming various questions concerning chemistry, and nobody really getting any answers. Very rarely is a chemistry orgy successful in its original purpose.

A candidate for a chem orgy must be verified before he/she partakes in said chem orgy, much like a normal orgy. An individual's intelligence, understanding of chemistry, amount of attention paid in class, willingness to share answers, and sex appeal. Despite the tedious chem orgy-goer selection process, this usually fails and the chem "study session" recedes into orgiastic behavior.
Brenda: You've been invited to this chat room!
yes i did it
Eric: wow
Kevin: hey jimmy
Eric: there are 7 ppl
Kevin: chemistry party
Eric: yes
which kevin is this?
Kevin: the kevin
Sally: (kim)
Eric: KQ
Kevin: The almighty
Sally: lol
Eric: what?
Paul: wow
Kevin: Kool
Jimmy: i'm talking
Kevin: Kevin
Eric: how dare you speak Chris Wu's name in vain
Kevin: :)
loll
Paul: i knew it was gonna turn out into a party
Sally: lolol
Brenda: yay you are talking
DUDE
Eric: YAY CHEM ORGY
Brenda: CHRIS WU didnt answer his phone
oh well
Sally: ok if eric stops talking
then
Brenda: WAIT
Kevin: hey guys
Sally: everything will be good
Kevin: chris wu
Brenda: SO HOW DO YOU EXPLAIN THE COLORLESS PPT
Kevin: asked me a question
Sally: ummmmmmmm
iono
Eric: colorless
by Eric Guan February 15, 2008
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