USM 

Abreviation for United States of Merica. This is the phrase for a stereotypical 'American' that sees themselves better than everyone else. This term is most commonly seen used in a sarcastic tone and southern drawl to appear as egocentric and to make light of a situation in a joking manner.

"This is the USM."

"The what?"

"The United States of Merica. Speak English or go back to China."

"I'm not Chinese I'm Korean."

*Confused look on face* "WTF is that?"

USM by etilauqa March 9, 2010

USM 

Stands for "Unbelievably Slothful Man"...A general term given to a person, usually your bosses, who continually pass their own work-load onto others in their employ...Commonly believed that such a fucktard will leave work and go home to lazy land to become a Bag Whacker again...

USM: "eeermmm....Karim, can you just do this for me..."
Karim (Depressed Employee): "mmmm...yeah, when I have time"
USM: (Leaves room)
Karim: "Fucking USM"

USM by Macster007 November 30, 2006

USM 

Underground Sex Machine.
A female, usually with lots of black eyeliner and a mohawk, who enjoys getting fucked hard.

"I am a USM."
"Drop ya pants."
"Fo' shizzle."

USM by Afro Man October 31, 2003

USM 

Uiversity
of
Smoking
Marajuana


By the one the only, the succesful failer ,the winning loser, the acceptable reject, Afroman the best rapper in the world to date on the song "Back to School" and if any of yall have sumthin to say about it you can go suck on ludacris's ass because he sucks and he only talks he doesn't even rap to the beat

Afroman: "Mama, ima go to the Univeristy of Smoking Marajuana all of my friends go to USM so ima tag along and hit tha bong wit them..."

USM by Hairy Culo February 23, 2005

USM 

1) Acronym: Unstoppable Sex Machine. Once used by the long disbanded British act, Carter USM.

2) Ultra Sexy Matsereguru. Alias of Dung Beetle, a once active member in the South Park online community who has vanished into obscurity.

USM by anon August 21, 2003

usm 

Abbreviation for "Unstoppable sex machine", as in "Carter: The unstoppable sex machine"

The only living boy in new cross

usm by Kung-Fu Jesus May 16, 2004

USM 

uncle sam mills usm

neighborhood ( usm ) uncle sam mills... the bi-racial african american from puerto rico thts everybodys tio... ( uncle )

USM by P4K_öŘĮgïñªł June 16, 2023