leaving a foul oder, usually in the form of a sbd fart for someone to walk into, unsuspectingly.
I just left a brown ninja for jeremy to walk into.
by rossta January 26, 2005
Get the brown ninja mug.
Someone who sneaks into a residence in which the dweller lives by themself, then deficates in their toilet leaving no visable toilet paper and then does not flush.
Jessie got home to her apartment after a long day at work. She stepped into the bathroom to take a shower when she spotted the foreign monster in the toilet bowl... she knew then the brown ninja had struck again.
by dsackaroo January 23, 2013
Get the Brown Ninja mug.
LEGO™ Man: “Hey have you heard that the Brown Ninja sacrificed Kai to Satan?”

LEGO™ Man 2: “Yeah, sadly they didn't get along since Brown Ninja was a god.”
by PseudonymDefinitionPleaseOrDie September 14, 2019
Get the Brown Ninja mug.
One who is a master of the brown eye. Can stealthily attack from behind with a thrusting motion.
Why does Brett have to be suck a brown-eyed ninja?
by Dan September 24, 2003
Get the brown-eyed ninja mug.