Pure physics answers that question with a resounding 'Yes'. But functionally it would be difficult. First you have the problem of diffusing the flatus through clothes. (yeah, I watch mythbusters what of it?) So you'd pretty much have to be naked for it to work. Then you have the issue of force produced. I'm pretty sure those SBD's we're so proud of would have your forward motion measured in meters per hour. Next you have to take directional capability into consideration. Would a person with an anal polyp be perpetually known as left-turn-luke?
The biggest question of all though... How are you ever going to find a Taco Bell in space?