What's the highest velocity airstream a human could generate by lung and lip power alone?

OK, I know it’s a weird question. If you must know the background, I don’t like killing bugs that land on me, so I blow them of with a little explosive burst of air. I’m surprised at how much force those little micro-bursts can generate. Any idea how fast that air might be moving right there at the old lips? I also realize that it will vary according to whether I’m a trumpet player or an asthmatic, so don’t bother telling me that.