Blunderbuss

 is a gun that fires a short-ranged spray of bullets.

Trivia

 * The description in the Ammonomicon is a reference to Farmer Giles of Ham by J.R.R. Tolkien.
 * The tag line is a reference to various old accounts that list the blunderbuss as being loaded with various scrap iron, rocks, or wood. However, this would result in damage to the bore of the gun and it was typically loaded with a number of lead balls smaller than the bore diameter.