Top Definition
Someone who is extremely proficient at stealing cookies without being spotted, regardless of how many people are in the vicinity.
Guy sees cookie.
Guy reaches for cookie.
Cookie disappears.
Guy cries.
Cookie Ninja has won.
by DLTZ April 28, 2013

Free Daily Email

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

Emails are sent from We'll never spam you.