GM 

Also manufacturers of Vauxhall, Holden, Isuzu, Daewoo and Suzuki.....all synonyms of dogshit and bumsweat.

GM by scheve April 2, 2003

GM 

Stands for Generic Mafia. A sweet halo clan.

GM kicks ass.

GM by Anonymous October 21, 2003

gm 

An abbreviation for group message

Yo man, you typed that message in the wrong gm

gm by Altruisticdevil September 13, 2016

GM 

A "Tag" I see graffitied all over San Diego. And because my name is Gregory May, I have associated those initials with my name.

GM = Gregory May.

GM by Gregory May July 15, 2010

GM 

An attempt by the Earth Federation to mass-produce the Gundam during the middle of the One-Year War.

However, it's just an el cheapo wannabe. Pronounced the same way that gym is.

"Sweet, I got a Gundam!"
"Nah dude, that's just a GM."

GM by MSV August 4, 2005

GM 

Garbage Metal

GM by Anonymous October 19, 2003

gm 

aonym for the 'great man'. actually a complete tool who resides in australia

gm's coming over for tennis tonight

gm by sj February 11, 2004