serial 

slang for serious. Favored by Al Gore on South Park.

Al Gore: "Manbearpig is very serial."

serial by Forceflow15 May 9, 2006

serial 

serial: serious. Serial is as serious as serial killers. So serious - more serious than cereal. Not as funny as cereal, but more concerned.

usu. in response: exp:

Richard, I'm pregnant!
Are you serial?
Holy rusted metal batman!
Are you serial?

serial by dueEast June 11, 2006

serial 

short for "serious"

"What? Are you serial?"

serial by CHOPOPJR November 3, 2003

Serial 

Another way to say "serious".

"Dude, I'm super serial. Why don't you believe me when I say I'm super duper serial?"

Serial by Bryan Castillo January 15, 2008

serial 

Short for serial number. Often used for an illegal method of registering a program one does not wish to pay for.

I got a serial for photoshop last night and it worked perfectly.

serial by Invalid H. User April 23, 2003

serial 

being very serious; dead serious.

John: "I scored with Kelly last night, it was TIGHT! man!"
Jeff: "You serial?"
John: "Hell yeah!"
Jeff: "With trix?" (aka: you're bullshitting)
John: 'No, I'm for real!"
Jeff: "Dam, mofo! Hell yeah!"

serial by Olgie March 30, 2010

serial 

short for serial killer

after droppin those six niggas we jus started callin him serial

serial by S. Loc January 7, 2004