When someone, usually your parents, randomly springs a topic, usually sex related, onto you unsuspectingly. Much like a ninja attack its always a surprise and sometimes its deadly.
by Mermaidmagic October 14, 2011

when things are going casually, and a friend surprise tickles you with the speed and agility of a ninja.
by ab09307 December 16, 2010

by Don Jr. March 16, 2025

by curriedkitty May 21, 2017

by Smrtblue December 6, 2017

'Ninja Lead' refers to Vietnamese women who ride Honda Lead, covering their face carefully to avoid the sun but ride recklessly
by Hmhm im thinking February 19, 2018

Guy 1"Bro did Chad get his certificate yet?"
Guy 2"for what?"
Guy 1"He's gotten away with fapping in the Wendy's so many times he can be eligible for a Nut Ninja Certificate"
Guy 2"for what?"
Guy 1"He's gotten away with fapping in the Wendy's so many times he can be eligible for a Nut Ninja Certificate"
by Sybr767 October 22, 2020
