Bludgeon Blade

Some blades, to be frank, suck at the "blade" part, often working much better as a blunt weapon for one reason or another. Sometimes this is by design, but sometimes, this is just Epic Fail on the part of those who made the blade for stabbing or slashing.

Video Games

 * Cloud Strife's Hardedge blade from Final Fantasy VII looks more like an abbreviated girder with a hilt than any type of blade, and even though it makes a cutting noise ingame, in reality, you'd be better off using it to club your enemy to death.
 * Guan Ping wields an over-sized broad sword in Dynasty Warriors. Thing is, though, is that it often does more blunt force trama damage according to the animations than it does by bladed damage.

Real Life

 * Can happen to any bladed weapon if you let it get dull enough.