look up any word, like donkey punch:
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!"
by Olgie March 30, 2010
8 4
slang for serious. Favored by Al Gore on South Park.
Al Gore: "Manbearpig is very serial."
by Forceflow15 April 27, 2006
463 116
short for "serious"
"What? Are you serial?"
by CHOPOPJR November 03, 2003
333 161
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?
by dueEast June 07, 2006
94 41
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.
by Invalid H. User April 23, 2003
67 38
Another way to say "serious".
"Dude, I'm super serial. Why don't you believe me when I say I'm super duper serial?"
by Bryan Castillo January 09, 2008
34 19
a gun's serial number...often scraped off to make the gun harder to trace
"serial killers tote guns without the serials"
--Streetlife in Rules (Iron Flag, Wu-Tang Clan)
by dubhex February 01, 2008
1 0