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 7, 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 9, 2005
To fart without hearing or feeling it. Often occurs when the person needs to use the bathroom to take a #2.
by Vandalier January 16, 2012