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2.
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 07, 2009
 
1.
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 04, 2006