Part of the Abadi numbering system. A number with 18 zero's after it. Following the number quintillion.
"Million, billion, trillion, cuadrillion, quintillion, sissilion."
"There's like, a sissilion viruses on my computer!"
Something you say when you have absolutely no idea what that subject of discussion is/am/are/should be.
justin: yeah dude it's so like...
abadi: so what?
justin: you know it's like...
abadi: ohhh... It looks like oprah