1 definition by ElonlyS0n1x

o si

A world that means "o really" in Spanish used commonly by Salvadorians in a sarcastic way

guy 1- just banged da grl i told i told u about
guy 2- y u lying
guy 1-na for real dude
guy2- oooooo siiiiiii jajajajaja

by ElonlyS0n1x August 28, 2007