What does burp soup mean?

burp soup meaning in Urban Dictionary

after you have eaten a hearty dinner, and quite possibly drank enough your fluid of choice, you have burp-soup. This is how you burp, but instead of just air you receive something extra which comes with it. It's not enough to be considered as throwing up, given that it's a sum that will be typically small enough to merely ingest once again which makes a disgusted face.