ninja farts 

Silent, butt supremely smelly flatulence.

I love to release my ninja farts when I am standing on the diving board before a dive. It really fucks up the next competitor.

I also love to release my ninja farts while getting my salad tossed by a male prostitute.

ninja farts by Gregg Loogyanus November 28, 2006

ninjafart 

Flatulence occurring in the presence of another or others that requires "hands-free" manipulation of the anal sphincter to expel the gas in silent undetectable manner.

I was having fun driving you guys to the ice fishing expedition until someone released a ninjafart. Too bad it was SBD, or it may have gone completely unnoticed.

ninjafart by PearlDiddy November 28, 2016