Here's a philosophical (and gross) question for you then: if I appear to vomit, ie I retch and forcibly eject stuff through my oesophagus and mouth, but there are no intestinal contents, only mashed up food, is that considered vomiting?

Just wondered because this often happens to me from severe pain.

Also, if you do the burpy thing but it does taste of vomit rather than food, does that mean it is vomit?