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 8, 2010
Get the Ninja fartmug. 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
Get the ninja fartmug. 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 July 30, 2008
Get the fart ninjamug.