Drain monster

There is a drain monster in our kitchen that rears its head at least once most days. I am sitting here at the table minding my own business, pretending to work, when from the depths of the sink comes an ominous, GLUG-KER-BLUG-UGG-G-BLUGG-GLUG-GLUG. It often gets loud enough to be heard in the next room and can last for several minutes. I am not sure what is happening in there, but I have the suspicion that it has something to do with the disappearance of my roommate.