The physical and emotionaldiscomfort one feels when attempting to hold in gas because the situation or location prohibits the release thereof; resulting in a small leakage of sound or smell.
Man, I had a seriously uncomfartable moment right when Heather and Liam were exchanging their vows. Did you hear me?
Dude, you looked pretty uncomfartable in the elevator; and by the way, did you notice that smell?
When you've got mad toots building up in your gut, but you're in public so you can't let it out. The pain just festers until you can make a run to the bathroom.