Top Definition
A single word that means so much. It entails that you have mighty mighty mad 1337 ninja skillZ.
Tom: What makes you think you can kick my a$$, Judy?

Judy: imaneffingninjayo!

Tom: *quivers in fear*
by thefriendlytoaster July 27, 2007
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×