Borborygmus (noun) is that rumbling, gurgling noise created as your lunch makes its way through the plumbing of your intestines. What a charming and useful word. At our house, we usually employ the plural form, borborygmi. That’s because we usually hear the whole orchestra, not a solo.
If you hurry, you can adopt this word and support the on-line dictionary, Wordnik, here http://www.wordnik.com/adoptaword/word/borborygmus
Don, Pittsburgh, February 7, 2018