buttriloquist 

someone who can make their farts sound like they came from someone else

Even though Billy was sitting in the third row he made the whole class think the teacher had farted. He is quite a buttriloquist.

buttriloquist by Rich EZ January 11, 2009

bumtriloquist 

The art of projecting (or to throw) ones fart in an unnoticable fashion and then blaming it on another person in the vacinity.

Tim: "Shane, was that you just farted?"
Shane: "Dear God, no! It appears that I have been framed by a bumtriloquist".

bumtriloquist by BrettLed May 28, 2010