An individual who sneezes openly, obnoxiously and without restraint. Free-sneezers have no regard for the health or comfort of those around them. They're either unaware or simply don't care about the germ-ridden mist launched from their mouths at 100mph after an unhindered sneeze. Mist that can hover in the surrounding air for up to an hour.
You'll get sick going on road trips with Robert. He's a shameless free-sneezer.