The strange sounding name of the Bohemian ear spoon has created many fanciful, suppositional misconceptions about this medieval weapon.
In general, it is a polearm, basically a weapon on a long handle used to give the wielder a longer reach in melee. Common polearms are spears and halberds. The Bohemian earspoon, in particular, is a weapon derived and developed from the partisan. It has a large spearhead, but instead of axe heads beneath the spearhead (as on the partisan) the Bohemian earspoon has spikes designed to penetrate the plate armor of the medieval knight.
The reach and the penetrating power made it an effective weapon for medieval infantry against mounted cavalry.