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The stealthy little bastard that haphazardly leaves brown marks on your undies. Also acts as a scapegoat to take the blame for unexplained events for which you would normally be blamed.

Also known as the pantie assassin (for girls :-p )
Damn - the poo ninja's dealt to my tighty whities!

Dad: "Where'd all the change from my jeans' pocket go?"
Son: "poo ninja must have got it."
by Dion_B June 13, 2006
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Sep 9 Word of the Day
the thing that you don’t have when you’re phones percentage is over 20
phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz
by lik_frls_dis.me February 12, 2020
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2
The stealthy little bastard that haphazardly leaves brown marks on your undies. Also acts as a scapegoat to take the blame for unexplained events for which you would normally be blamed.

Also known as the pantie assassin (for girls :-p )
Damn - the poo ninja's dealt to my tighty whities!

Dad: "Where'd all the change from my jeans' pocket go?"
Son: "poo ninja must have got it."
by Dion_B June 10, 2006
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