A burp which regurgitates an unknown mysterious substance; usually something you have just eaten or imbibed.
It can be a rather
disconcerting process but on the whole
there is nothing to be concerned about.
This is not to be mistaken with throwing up a little bit
in your mouth as this is not an unpleasant experience, rather it can be quite enjoyable!
Steve: "Hey Pete, I have just enjoyed a rather nice cheese and
pickle sandwich. All of a sudden I just burped and it feels like I just regurgitated some undigested sandwich!"
Pete: "Hey don't worry Steve,
you just did what is commonly known as a regurgiburp! Enjoy the ride dude!"
Steve: "...
if you say so! You have issues!"
Pete: "Dude, its natural!"