nail bat

noun1

1. •
   (informal, slang) A weapon made by hammering nails into a wooden baseball bat, used for offense or defense.

   • These include spears, blowguns, rocks, sticks, morning stars, nail bats, punjisticks, torches, bolas, chakras, atlatls, meteor hammers, quarterstaffs, ballistas and slingshots. — 2011