An "SI" prefix meaning 10^21, also known as a sextillion. It's more commonly used a a phrase meaning "very" by the character Sho Miyamoto in the Square Enix game, The World Ends With You.
"Wow, that's zetta cool!"
© 1999-2015 Urban Dictionary ®
Free Daily Email
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from firstname.lastname@example.org. We'll never spam you.