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 !!!