Etymology of Borborygmos?
This is speculation, but Borborygmos has a heavy flavor angle of the barbarian trope of fighting and feasting.  The flavor text on the original printing of Borborygmos references the only other two cards in the original Ravnica block referencing Borborygmos, Wreak Havoc (where he is quoted saying, &quot;Crush Them!&quot;) and Protean Hulk (where he is quoted saying, &quot;Meat and eggs.  We eat!&quot;).  What better name for him than the rumbling of the intestines?  It combines his two obsessions of brawling and eating.
See the flavor text on the following three cards: