A comment that is a waste of air and annoying to others. Something you say that is unnecessary and annoys people. A sly comment, a stupid comment, or a waste of your intellectual judgment. It is literally a waste of air to make yourself feel good but is inconvenient and annoying to others. Expressing an opinion that is not fruitful and was not asked for.
Person A: "That's so dumb. I would never do that."
Person B: "Bless you."
Person A: "I didn't sneeze."
Person B: "Yes, you did."