Blunderbuss
Blunderbuss ({not transcribed}) , noun
[Either from blunder + Dutch bus tube, box, akin to German buchse box, gun, English box; or corrupted from Dutch donderbus (literally) thunder box, gun, musket.]
1.
A short gun or firearm, with a large bore, capable of holding a number of balls, and intended to do execution without exact aim.
2.
A stupid, blundering fellow.