Blunderbuss \Blun"der*buss\, n. [Either fr. blunder + D. bus tube, box, akin to G. b["u]chse box, gun, E. box; or corrupted fr. D. 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. [1913 Webster] 2. A stupid, blundering fellow. [1913 Webster]