look up any word, like wcw:
 
1.
One of the best Chicano Rap Artists from the Westcoast.
He is one serio vato. Serio is one of the best chicano rappers I know. Nightmares Turned Into Reality from Califas 2 Washifas
by Jonathan Perez December 27, 2007
 
2.
spanish for serious
boy: Quiero los zapatos azules.

girl: serio?!?!?!?!?
by 662614 September 22, 2009
 
3.
Means the same as "serious"
"Are you serious?" becomes "Serio?"
by Starry December 08, 2004
 
4.
For reals , Is that so. Telling me the truth. Seriously
I'm Serio, I want to go to that party tonight
by Katrina November 16, 2004
 
5.
Pronounced: Se-Ree-O, the 'se' part is elongated, said with an arched brow and tilting the head back.

Meaning(s): 'is that so'; 'are you serious'
Girl: I wanna get some hubcap spinners for my focus
Guy: Serio
Girl: =\
by SaraZ May 03, 2005
 
6.
the state or action of complete domination of the competition.

"Jeff completely serioed the other team's defense by scoring three touchdowns"
by Edinburgh984 March 08, 2009
 
7.
internet abbreviation for the word serious, usually used in combination with "r u" or "u canot be"
OMG WTF I AM SO SERIOS whine whine
by Occupant Ilied Industries May 02, 2005