Alex: Okay, what the hell is that smell and where did it come from?!
Jake: Somebody just had a bad ninja fart!
Jake: Somebody just had a bad ninja fart!
by Flubber Womp December 07, 2010
blowing it at the worst possible time. messing up in the least expected way when everything else is perfect. picture a ninja on a mission. climbing buildings, jumping roofs, tiptoeing here and there. and just as he's right above some enemy samurai or something, at the most crucial time, the ninja rips a loud squeaky fart. buweeet!!!
i finally got alone with that chick ive had my eye on, but i proceeded to rip a ninja fart when i talked to the fifty year old prostitute instead.
by deezo May 09, 2005
One who covers their nose with the collar of their shirt to avoid the odor of a heinous fart, thus resembling a ninja.
by Dave Beyer June 05, 2006