1 definition by SaraZ

Top Definition
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
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