when one is drinking a beverage in most cases an alcoholic beverage & in a hurried manner. usually more prevolent with carbonated ones more so, beer, malt liquors, etc When the thrashing & compression of trying to force the beverage down the gullet a near combustible state occurs in the subjects mouth forcing the liquids,foam, froth and other liquid forms back over the lips and down the chin,neck and it also should or may include back thru the nose......this is SUBURBULATION !!!

When you eat dirt for the first time and leave your family to build a shack in the woods