I have been desperately trying to find out about this online, and the only thing I found was a link to Urban Dictionary....

For as long as I can remember, I've often had this weird reverse burping thing going on. I can't seem to find out what causes it - it's especially bad if I drink carbonated beverages and things like that, but it also appears randomly, whether I've eaten anything or not. It feels as though I need to burp, but I don't know how, and instead it makes a weird internal sound (kind of like one of those weird sound tubes they make for kids) and I can feel the air moving in my throat. It can be pretty embarrassing, because sometimes it's quite loud, but more importantly it's terribly uncomfortable. It also makes me feel like I should eat something to sort of fill up space, but eating never really makes it go away, either. I've tried using things like Mylanta and Rolaids and all that stuff, but it doesn't really help. It's like it just has to go away on its own, and often the only thing that makes me feel better is to lie down, but when I get back up it comes back. What the hell is this problem?! Has anyone heard of this? And what can I do about it?! Please help me, because it's getting to be too much for me