A ninja like person who likes giving it or taking it in the vag. A butt pirates sworn enemy. A word made up so it would make the dispute between pirates and ninjas even more complicated.
person 1:wtf? twat ninja?
person 2:yeah, you know, opposite of butt pirate?
person 1:ohh, soo... im a twat ninja?
person 2:yeah, you know, opposite of butt pirate?
person 1:ohh, soo... im a twat ninja?
by yourmom6t9s June 2, 2009
the act of sneaking up behind a female and hitting them in the vagina. Works best while walking up the stairs behind them. You can use a closed fist or an open palm.
Guy: *walking up stairs behind girl, hits her in the vag*
Girl: Ow! What was that for?!
Guy: Nothing... I just wanted to Ninja Twat you.
Girl: Ow! What was that for?!
Guy: Nothing... I just wanted to Ninja Twat you.
by ilovebirchbeer_not April 28, 2009