The act of sneaking up behind a girl and smacking her in the face with your cock when she least expects it...like a ninja.
by Ms. Cock Muslim July 13, 2009
Get the Cock Ninjamug. by Full Bladder October 29, 2006
Get the Cock-Ninjamug.
Get the Cock Ninjamug.
Get the Cock-Ninjamug.