I have seen pictures of Big Gunns, and they are sadly, not so large and more importantly, not worthy of an additional silent "N".

But I'm comparing him to an average-sized man - his actual point of reference may be much, much smaller.

While Bloated Goiter is indeed my work, I feel you are overlooking such other bon mots as Bumpy Gonads, Baggy Grapes and the ever-popular: Burning Gallstone.